It would be helpful to determine if the Richardson of the 1st Texas was at Gettysburg, presuming this is a separate individual. I am unsure about the identity of the assistant surgeon of the 1st Texas at Gettysburg. I thought it might be Philip Work, whose son (of the same name) was colonel of the 1st Texas. We do know the surgeon of the regiment, Henry W. Waters, was also left with the Gettysburg wounded and captured. Waters graduated in 1855 from the University of Louisiana's Medical Department; he used an amputation set made by Maw & Son, London.