It's an idea I'm playing with to see if it could possibly make sense. When Terry went to visit in AZ in 1975 or 76, he was already split from his wife. She had custody of the four kids, and it's my understanding he came by unannounced for a visit. He brought the unknown woman with him. I was thinking perhaps she was pregnant at the time, or shortly thereafter. He told the family that he was living in Ingleside TX at the time (who knows if that's true), but he moved around a lot. So I started looking for women who were missing from TX at the time. Beatrice is not likely to be the unknown woman- it was a long shot.
Somehow, by 1977-78 he showed up in CA and began dating Marlyse Honeychurch. At some point, they went to New Hampshire with all 3 girls. The unknown child is older than Sarah McWaters, who was born in 1977. I firmly believe that the mother of the unknown child was dead by the time he started dating Marlyse. That was his MO.
I don't know if looking for Little Bear Brook's mother in TX is even reasonable. She could be from anywhere. Maybe not reported missing. But TX, AZ, CA and HI are all places he was known to be in that timeframe.
