Thanks, ghosts. He sulkily cleans them up so he can get more favors later.

Sherlock travels to the YMCA and the homeless shelters, and saves some of what he cleaned up at Dignity village as well as a small sample from the Rose Garden and examines all the samples to see if they're the same kind of plant or if there is any differences between them.

More cleaning?! Ugh. Sherlock is starting to hate these weeds.