Ybarra, J. M. [Transcript of Letter from J. M. Ybarra to Stephen F. Austin, June 26, 1830], letter, June 26, 1830; (https://texashistory.unt.edu/ark:/67531/metapth217437/m1/1/: accessed February 25, 2020), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .