Message of Gov. O. M. Roberts on appropriations and expenditures under the control of the governor to the seventeenth legislature of the state of of Texas, convened at the city of Austin, in regular session, January 11, 1881., book, January 11, 1881; (https://texashistory.unt.edu/ark:/67531/metapth5832/m1/3/: accessed April 25, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .