In no particular order:
Mom wanted my cousin Janet to have two rings, and two specific books, and we couldn't find any of them, despite searching repeatedly. This doesn't make sense: if only the jewelry was missing, it might conceivably have been stolen, even though other appealing jewelry was in her bedroom closet, including the few items that are mentioned in the will. If it was just those two used books, maybe they were put away somewhere safe. But there's no reason the rings and books would have been in the same place, where we couldn't find them while going through things that thoroughly.
Mark was already planning to take all of Mom's unclaimed jewelry back to New Orleans, photograph it, and offer it to our cousins. Because the rings Mom promised Janet are missing, he's going to give Janet first pick. (He, Linza, and the three of us have already looked at it, and taken a few things.)
The whole process was very amicable. We weren't arguing over who could take something that wasn't specifically left to either me or my brother, but agreeing that Mom's crystal might be pretty, but wasn't worth trying to take home on the plane. Instead, Mark took a glass bowl that a friend of his made, and Andy took a small piece of cranberry glass. There were two envelopes of paper money; we split the pounds, and I told Mark to take all the euros, because he's probably going to visit the EU fairly soon.
There were more than enough good photos of Mom, her parents, and other relatives for me and Mark to take home, in some cases duplicate prints of the same picture. I labeled a few photos of people I wasn't sure I'd recognize if not, including a couple of pictures of my paternal grandparents, and one of Dad's older sister. I decided I wanted my mother's first US passport, from a trip to Europe in 1953, and her resident alien card (from before they were green).
Mark took some photos and documents home because he thought Janet would want them, and he was willing to schlep things for her. I'm not sure if that's because he's one of the executors of the will, or simple generosity.
As we were packing yesterday, we decided to take Mom's salt and pepper grinders: they have no sentimental value, but we've been unhappy with both our current pepper grinders and one of our salt shakers.
otter's comment reminded me that there also is, or may be, a gold charm bracelet that belonged to our grandmother. Janet asked to buy it from me and Mark, but we didn't find it either, only a different gold charm bracelet that belonged to Simon's first wife. The one we found is in the will as going to his daughter Liz, and after Mark took a picture, Liz confirmed that the bracelet we found was her mother's, and Janet didn't recognize it. We left that in the flat, because Liz will be in London in a few months. It's possible, though not likely, that my aunt Lea had the bracelet Janet wants, and that it's still in her and Dave's apartment. We asked Lea's daughter Anne, who doesn't have it but is going to ask Dave.
If Dave finds it, or if the bracelet turns up a few months from now at Mom's flat, we'll give it to Janet, not sell it, but we're waiting until the bracelet turns up before telling her that.
[I am adding to this as I think of other things that seem to belong here.]