Artists for U.S.P.R.R. Expeditions & Surveys

From: "Tonya Anderson" tonyakev@yahoo.com

Was John Mix Stanley the only artist used for the Wildlife and Bird Engravings for the U.S.P.R.R. Expeditions & Surveys? If there are multiple artists, where can I find a list of the Artists and the Plate Numbers that are associated with each of them? Any help you could give would be greatly appreciated.

—Tonya Anderson