I resent my original email. I used a different email address
jamesmoore4980@sbcglobal.netO'Rouke's book concentrates mainingly on the families that stayed in Perry County Missouri. Brewer is a very common name in Perry County. O'Rouke does not mention any Brewer's going to Texas in his one page titled Texas Fever. He does mention that Yoakum straddles the Dewitt and Lavaca county lines.
I found seven William Brewer's. I will need his spouse's maiden name or his father and mother's maiden name with a date of birth or death to verify that one of these Williams are your relative.
One William H. Brewer born in 1891, this is not a match for your William.
No listing for a Henry Porter Brewer.
I have found that searching a state's internet archives is a very helpful. Missouri has the two earliest state history books digitized and are easily searched. Perhaps Texas has a similar resource.
Good luck with your search,
Jim Moore