I love this episode, with the pedestrianness (there's a word for you!) of life at Collinwood contrasted with the spookiness at the mausoleum.
Willie's gear - block and tackle and whatever else he had - has been cleared out of the mausoleum. The idea seems to have been for people to think nothing had been disturbed, but the broken lock and the cigarette stub tell another tale. Jason, sleuthing to find out where Willie is, is also covering up for him. No, no, Willie wasn't at the mausoleum. Couldn't have been, or he'd have left a mess. Must have been somebody else. The cigarette stub is tucked into Jason's pocket so the caretaker won't see it. And back at Collinwood, Jason doesn't mention that he's been to the cemetery. Willie may have been digging up corpses for their jewels, but Jason's not telling. There's honor among thieves, of a sort.
It occurred to me today to wonder if there are any financial arrangements for that mausoleum. It's a building. It must need some sort of upkeep, despite the caretaker's insistence that people keep away from it. Did the initial payment for the building cover the upkeep in perpetuity, or does Elizabeth (or maybe Garner & Garner) send a monthly check?