I found no William Howe in Grayson County, Texas in 1850. The only William Howe in Texas is in Galveston County, City of Galveston. Age 16 born NJ apprentice to and in the household of Wilber Cherry, publisher, "Journal," born in NY. Is this your guy? NO listings for W. Howe, Wm. Howe, W. R. Howe, Wm. R. Howe, W. R. B. Howe, Brown Howe. (soundex) There is a William Hai in Harris County, William J. Hoy in Refugio, and William S. Hoy in Smith County. I used Ancestry.