Full source URL: https://web.archive.org/web/20170208042157/https://wei.sos.wa.gov/agency/osos/en/press_and_research/PreviousElections/Pre2004/Documents/1889.to.1948/1904%20General%20Abstract.pdf
Source for Popular Vote data: Washington Secretary of State. Abstract of Votes Polled in the State of Washington at the General Election Held November 8, 1904, Washington Secretary of State (https://web.archive.org/web/20170208042157/https://wei.sos.wa.gov/agency/osos/en/press_and_research/PreviousElections/Pr) (accessed 22 Jan 2024)