Twin Sisters: Historical novel based on the Texas Revolution

On November 17, 1835 the people of Cincinnati, Ohio raised the funds to aid the Texas Revolution, and the foundry of Greenwood and Webb manufactured two six-pounder cannons known as the Twin Sisters. They are credited with having won the Revolution against Mexico in the battle of San Jacinto. There are various stories as to the fate of the cannons at the end of the war.

Is it true that the Twin Sisters cannons were found buried on a ranch in Uvalde, Texas in 2011 or is there a more devious explanation?