Sherlock notes that fact as well, and he's almost certain he knows who that relative is. His investigations into Mr. Chapman had uncovered the fact that his mother left Turner and his father when Turner was very young. Sherlock hadn't looked into her because there was really no need to, since past a certain point Mr. Chapman was merely part of a bigger picture with bigger fish to fry. Now, however...

He sees Ted's anger, and resolves to talk with the man about it when they've got a moment alone.

"It's very kind of you," Gerald says with clear admiration. "Particularly considering your history with Mr. Chapman." He picks up one of the forms and slides it toward Ted. "This says you take responsibility for making arrangements for the disposition of Mr. Chapman's remains." He passes him a pen. "Please sign on page two."