... that Boston's World's Museum featured a "hall of curiosities" which displayed humans with biological rarities, among them albino sisters Florence and Mary Martin (pictured)?
Source: "At the World's Museum". The Boston Globe. January 26, 1886. p. 8.
ALT1: ... that Boston's World's Museum was a theatre, an aquarium, a menagerie, and a freak show? Source: "At the World's Museum". The Boston Globe. October 6, 1885. p. 2.