“One of Brown’s best monograph sketches, for example, narrates the tragedy of Charles Stull, a deaf and mute man from Philadelphia who decided to cross the Oregon Trail, alone and on foot, during the peak emigration year of 1852. Stull died of cholera at Castle Creek, just west of Ash Hollow. He was found by the members of a passing wagon train, who examined his body and found $2.75 in his pockets, along with a certificate attesting to his graduation from the Pennsylvania School for the Deaf and Dumb in Philadelphia. I learned from Brown’s account how crowded the trail was that year, and new details about the cholera plagues. Brown also portrayed how early-nineteenth-century educators and philanthropists founded schools for the deaf and circulated beautifully illustrated pamphlets on sign language. Stull was an exemplary product of that era. He was one of the first students at the Philadelphia school for the deaf, and he and his brother, an engraver, published one of the first sign-language manuals, an illustrated broadsheet titled An Alphabet for the Instruction of the Deaf and Dumb. The”