He kept a journal that was published in 1807, the first published journal from the expedition. In it, he coined the term “Corps of Discovery”. The book was first printed and sold by subscription in Pittsburgh at $1.00 per copy. It was later reprinted in England and translated into French and German. A reprint is currently being sold by the University of Nebraska Press and the University of Nebraska at Lincoln online version of the Lewis and Clark journals [https://lewisandclarkjournals.unl.edu/search?creators=Gass%2C+Patrick give 222 entries from Gass's journal.