I would e-mail him thanking him and then mention that so and so left a watch in your car and ask if he would like you to drop it off at h's place before they leave town.

A nice gesture on your part.

Me 50
H 42
S 22
S 9
D 7
M 12
T 17
H moved out 8/2006
H moved home 1/2007 for 3 weeks
H moved home 5/2011 for good

"Learn from yesterday ~ Live for today ~ And hope for tomorrow"