I did not know your father-in-law. In fact I did not serve in the Pacific. However, I have looked up information on the Americal Division, 182nd. Infantry Division, which I posted to the GenForum Sept 6, 1999. I noted that the unit was at Cebu, so it ties directly to TEX.
Upon your return to that sec, type in Americal Division in the SEARCH column, and my response should come up if you are interested.