Mr Sacks! Take this pail of... snow?

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From: Day 1: A Peevish Visit from Mr Sacks?

Best be rid of the stuff. It's beginning to melt, and the odour is not attractive.

Unlocked with 1 x Unusual Pail of So-Called Snow


A judicious nod

"The lacre is of the quality I might have expected. Yes, indeed. Not generous, but sufficient." It snares it with a sweep of its cloak, and departs. What's this it's left behind? Since when does Mr Sacks leave gifts?