Vintage Base Ball Federation — Organization of federated clubs that produces the annual World Series of Vintage Base Ball.

Vintage Base Ball Factory — Produces 19th century styled baseball uniforms and equipment.

Vintage Base Ball Association — Organization that presents the game of base ball as it was actually played in accordance with the rules, equipment, uniforms, field specifications, customs, practices, language and behavioral norms of the period.

The T206 Collection — The T206 Collection: The Players & Their Stories neatly recounts the human stories—often triumphant and sometimes tragic—of the ballplayers immortalized in the Tobacco Trust's famous 'white border' set.

Society for American Baseball Research (SABR) — Membership organization that fosters the research, preservation and dissemination of the history and record of baseball.

Society for American Baseball Research (SABR) UK Chapter — Organization based in the United Kingdom that is interested not only in baseball, but the history of baseball as it relates to Britain.

Peter Morris, Baseball Historian — Author of numerous historical books on the sport.

New England Vintage Base Ball — Organization of 19th century base ball clubsfrom MA, CT, RI and NH.

K & P Weaver, LLC — Manufacturer and supplier of vintage base ball uniforms and equipment.

The Illustrated History of Base Ball Cards — Illustrations and historical information by David Rudd Cycleback.

Hartford Senators Vintage Base Ball Club — Hartford's own 1880s team.

Famous Firsts in 19th Century Base Ball — Provided by Baseball Almanac.

Ebbets Field Flannels — Maker of vintage sportswear garments.

Dressed to the Nines — A history of the baseball uniform as presented by the National Baseball Hall of Fame and Museum.

Diamonds in the Rough — Game photos from around the region by photographer Ray Shaw.

Bulldog Bat Company — Specializing in hand-turned vintage base ball bats. Provides photos and information on equipment offered.

Baseball Cards 1887-1914 — Collection of 2,100 early baseball cards from the Library of Congress American Memory project.

Albert G. Spalding Collection of Early Baseball Photographs — Presented by the New York Public Library Digital Gallery.

19th Century Base Ball — Photos and information including rules, evolution of base ball equipment and field of play, leagues and tours from Eric Miklich.

19th Century Base Ball — Historical summary plus information on the 1869 Cincinnati Red Stockings from baseball-reference.com.