Maignan, V. E. [Letter from V. E. Maignan to Ferdinand Louis Huth, April 9, 1856], letter, April 9, 1856; (https://texashistory.unt.edu/ark:/67531/metapth188587/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .