He had to hire a team of private detectives, one team in the US and one in Ireland.
He also had two lawyers.
Still, he wasn't sure if she'd want to know him, or if she was still alive, but he just wanted to know that part of who he was.
They actually found his half-brother first, so Bob contacted him first to sort of test the waters. Luckily, the brother knew his mother had had a baby when she was a teen.
The brother and his family were delighted, and he learned that his birth mother would be, too. She was only 15 when she'd had him.
He'd never had any brothers or sisters growing up and was thrilled to find them.