In Elizabeth Meaders’s eating room, the horrors of slavery are displayed on the desk: reward posters for the seize of individuals fleeing enslavement and the instruments — a branding iron, picket hobbles and a bullwhip — for punishing them.

Within the room by her entrance door, an exhibit of navy objects utilized by Black troopers consists of headgear worn by Tuskegee Airmen in World Battle II and a parade helmet utilized by the famed buffalo troopers within the 1800s.

In the lounge, the sofa is flanked by a life-size wax determine of the baseball slugger Hank Aaron and cabinets of things honoring Black athletes, together with a pair of Muhammad Ali’s tall white boxing footwear.

From the surface, Ms. Meaders’s residence on Staten Island is unremarkable — a slim, three-story field within the working-class neighborhood of Mariners Harbor. However to step inside, along with her as your information, is to journey by the Black American expertise, from the horrors of slavery and the dream of the civil rights motion to the glory of stars like James Brown and Cab Calloway.

The gathering of roughly 20,000 objects that Ms. Meaders, a retired New York Metropolis schoolteacher, has been constructing for greater than six many years is among the largest collections of African American historic artifacts within the nation.

Tons of of things are organized thematically all through the home, turning it into one thing of a museum, if one which few individuals have ever seen in individual.

“That is simply the tip of the iceberg,” Ms. Meaders stated not too long ago whereas strolling by the reveals. Many of the assortment, she added, is stored in storage crates in closets, the basement and the storage.

Ms. Meaders, a retired New York Metropolis schoolteacher, stated she started amassing in her youth with mementos of Jackie Robinson and different Black athletes, then widened her amassing to “encompass myself with issues that lifted my spirits.”

However she is now 90, and with restricted years and cupboard space left, she is lastly promoting her assortment in a single bulk providing on March 15 at Guernsey’s public sale home in Manhattan.

“I can’t go any additional — the gathering is outgrowing the home and pushing me out,” stated Ms. Meaders, whose two daughters will not be excited about taking it over. “I’m used up and the area is used up, so it must be transferred into competent fingers that may take it to the following degree.”

Ms. Meaders stated she hoped to draw a purchaser who would make the gathering accessible to the general public and to students, at a museum or college, for instance.

“I hope the sale will give it a greater life as a result of it doesn’t belong in anyone’s home any longer — every bit wants an opportunity to sing its personal track,” stated Ms. Meaders, whose actual want is that the objects turn into the idea of an African American museum in New York.

Many objects lack documented particulars on their provenance, authenticity and historic significance, leaving Ms. Meaders herself as the only real authority. She has made lengthy video segments detailing the gathering.

Arlan Ettinger, president of Guernsey’s, stated he knew of “no different assortment of this measurement specializing in Black historical past ever arising on the market at public sale earlier than.”

“Crammed into this easy house is a group that tells the entire saga of African American historical past, from the scourge of slavery to the wrestle of civil rights, to Black troopers in all of our wars from the Revolution by Vietnam,” stated Mr. Ettinger, whose public sale home has dealt with the property gross sales of Duke Ellington, John Coltrane, Rosa Parks and Joe Frazier, in addition to some Apollo Theater materials.

Diane DeBlois, a co-owner of aGatherin’ ephemera sellers in West Sand Lake, N.Y., who appraised the gathering at $10 million, stated it was enhanced by the again story of a plucky schoolteacher who was resourceful sufficient to amass objects on a shoestring price range.

“She needed to go toe-to-toe with some fairly spectacular collectors to outbid them,” Ms. DeBlois stated. “She raised cash by bake gross sales and college raffles, all types of how.”

Ms. Meaders stated she funded her acquisitions by working a number of jobs at a time, in addition to shopping for objects on installment plans and borrowing in opposition to the worth of her home.

“I’ve by no means been rich, however I refinanced my home a number of occasions and ran up fairly a little bit of debt,” she stated.

Randy F. Weinstein, founding father of the W.E.B. Du Bois Heart in Nice Barrington, Mass., appraised the gathering at $7.5 million in 2009.

“I’ve seen nice collections, however this was one thing in my wildest goals I may by no means think about, the vastness and depth of it,” he stated.

Mr. Ettinger stated he had already been in discussions with potential patrons, together with a number of universities, and that it was doable a deal might be struck earlier than the public sale.

Usually, he stated, a philanthropist may purchase such a group to donate for the general public good; that occurred with the Rosa Parks property, which was purchased by Guernsey’s by the Howard G. Buffett Basis in 2014 for a reported $4.5 million and donated to the Library of Congress.

Ms. Meaders, a historical past buff, stated her amassing started with fan materials associated to her teenage idol, Jackie Robinson, who broke skilled baseball’s coloration barrier when he joined the Brooklyn Dodgers in 1947.

She started visiting sports activities memorabilia reveals after which shopping for objects honoring different Black athletes, just like the boxer Joe Louis. A picture of Crispus Attucks, believed to be the primary American killed within the American Revolution, sparked an curiosity in Black navy objects, “and little by little I simply expanded, and it turned a labor of affection,” she stated.

Ms. Meaders’s ancestors, she stated, embody servants in abolitionists’ households within the 1700s and the final slave freed on Staten Island, within the mid-1800s.

Her grandfather, William A. Morris, owned an public sale home on Staten Island and based the island’s N.A.A.C.P. department, she stated. He later had a center college named after him the place Ms. Meaders taught historical past.

“I’ve struggled to inform a historical past that’s been both ignored or not instructed appropriately, and it’s a historical past that’s immediately associated to me,” she stated. “The extra I discovered, the extra I needed as a result of the entire thing turned an enormous puzzle and I started obsessively making an attempt to fill within the lacking items.”

A principal objective was to teach individuals on forgotten Black tales.

“This can be a motherlode of data, with so many tales which have by no means been instructed,” she stated. “That’s the aim of my assortment: to teach, heal, encourage and empower.”

Wyatt Houston Day, an historian and appraiser who has visited Ms. Meaders’s residence, agrees.

“The factor that makes her assortment so distinctive,” stated Mr. Day, who can be a former specialist in African-Americana gross sales at Swann Public sale Galleries in Manhattan, “is that she has a number of the connective tissue that fill within the gaps in different accounts, small belongings you received’t discover in different collections however that add the vital particulars.”

For instance, he stated, “individuals speak about African Individuals within the navy, however she has an precise musket that will have been carried from a Black Civil Battle soldier.”

Ms. Meaders stated she did little or no shopping for on-line because the specialised objects she was in search of had been greatest discovered by wanting by sale catalogs at auctions and continuously calling sellers.

She was additionally an everyday at reveals for vintage distributors and sellers of historic, navy, sports activities and different memorabilia.

At many gross sales, she stated, “I used to be typically the one Black lady there, and I used to be thought of an oddball.”

Ms. Meaders has devoted her life to the gathering, Mr. Day stated: “When she began, nobody knew who she was, and now she’s legendary in amassing circles — all people is aware of Elizabeth.”

There have been some objects that her restricted price range made out of attain. For instance, when bidding by cellphone on one of many pens used to signal the 1964 Civil Rights Act, Ms. Meaders reluctantly withdrew when the bid went as much as $8,000 with no installment plan out there.

She nonetheless regrets it. “That will have been the spotlight of my civil rights assortment,” she stated.

Down a slim, creaky stairway to her basement is an exhibit that she calls “Civil Rights and Civil Wrongs.”

There’s a Ku Klux Klan grand dragon gown and a Okay.Okay.Okay. model water pistol for kids. Subsequent to the boiler are posters from Harlem’s well-known Apollo Theater and a rocking chair that belonged to the pitcher Satchel Paige. Close by is a golf bag that belonged to the pioneer Black golfer Charlie Sifford.

A treasured piece is an Military of the James Medal given by the white Civil Battle basic Benjamin Butler to one in every of his Black troopers.

Requested about the potential of fireplace or burglars, she shrugged. “I hate to inform you,” she added, “however there aren’t too many individuals who would even know what they had been taking a look at.”

Many objects are one-of-a-kind, such because the hand-carved picket mantelpiece depicting the abolitionist John Brown. One merchandise Ms. Meaders holds expensive is a medal honoring Crispus Attucks that she stated she acquired from a “prime supplier who’s nicely often known as a crank.”

“I needed to undergo hell to get it, nevertheless it was price it,” she stated.

Promoting her assortment will lastly get Ms. Meaders some residing area, however she admitted that it won’t fully halt her amassing.

When a desired merchandise got here up at public sale not too long ago — a Ku Klux Klan gown made for a kid — she resisted and as a substitute implored a fellow collector to purchase it.

“I believe that even after I’m in my coffin and one thing comes up for public sale,” she stated, “I’ll most likely toss a bid out.”