I'm going to poke around to see if I have a sheet of that clear acrylic sheeting that I used to put on the wooden table tops to prevent spills on the wood (sometimes I put a table cloth over it, sometimes I put it over the table cloth). Chances are I have a piece I can trim to fit this table, and then clamp it down on the sides, and remove one side and roll it back when I want to work the puzzle. I think I might simply use a couple of those extra-large binder clips for this. The mid-century table top I use for puzzles has a beveled edge, no trim to make the edge too thick for this.

Jon, I am curious if those puzzles were commingled by your father. The only way to sort them is to work them side by side to sort the pieces. A lot more complicated than a game of double solitaire, etc.

By default, January ends up being a "no spend" month—as the bills from the holidays come in the resolve to do better is typically at the top of my To Do list. I see that UPS stocks are listed on the NY Stock Exchange, and I certainly contributed to this year's profits. Sigh.