Shekalim 15: Raiders of the Lost Ark

The 2 chambers in the Temple, one for secret donations and one for the vessels. Every 30 days, they'd review what had been donated, and figure out how best to use it. Also, a story of Nachum Ish Gamzu - on which he had reason to regret his plan to delay giving tzedakah, and loses the chance, to rather ill effect. Which becomes a treatise on suffering. Also, more on the items that were kept on the Beit HaMikdash. And the fact that the aron (ark) is already gone from there, and an indication of its hiding place, or what happened to it.