Peter H. Watson was the second United States Assistant Secretary of War from January 24-January 28, 1862, a United States Patent attorney and a personal friend to Abraham Lincoln.
Watson was a United States patent attorney and for four days from January 24-January 28, 1862 was the 2nd United States Assistant Secretary of War. He replaced Thomas Alexander Scott. On January 29, 1862 John Tucker replaced Watson and assumed the positon as Assistant Secretary of War.
- Perley Poore, Benjamin (1878). The political register and congressional directory: a statistical record of the Federal Officials...1776-1878. Boston: Houghton, Osgood and Company. p. 232. http://books.google.com/books?id=Nn0FAAAAQAAJ&pg=PA232.
- "The New Assistant Secretaries of War.". The New York Times. January 27, 1862. http://www.nytimes.com/1862/01/27/news/the-new-assistant-secretaries-of-war.html. Retrieved 20 May 2017.