Mentioned in The Clapp Memorial: Record of the Clapp Family in America, Containing Sketches of the Original Six Emigrants and a Genealogy of their Descendants Bearing the Name. With a Supplement and the Proceedings at Two Family Meetings.
While not much is known about Henry Clapp, Jr.'s brother George, his obituary provides several important biographical details about his life and career. According to the obituary, George Clapp came to New York before the Civil War and remained there until his brother's death in 1873, when he returned to Boston. Clapp remained in Boston until 1885, when he returned to New York, "miserably poor," to work as a used bookseller among his "established clientele." Two of these men, J.H. Johnston and Nathan Appleton, are quoted remarking upon Clapp's character and skill as a bookseller.
Born in Massachusetts to a family of merchants and seamen, Clapp traveled to Paris to translate the socialist writings of Fourier. In Paris, Clapp abandoned his ardent sympathy for the temperance movement and embraced the leisurely café life of the city. Upon returning to New York in 1850, he sought to recreate this atmosphere, spending hours at Charlie Pfaff's beer cellar, drawing a crowd of journalists, painters, actors, and poets to cultivate an American Bohemia in which participants admired and discussed the work of Edgar Allan Poe, Charles Dickens, and Washington Irving (Martin 15-7).