Auto-translated
1. Glupov. One should have read Saltykov-Shchedrin.
2. There is a theory that these are complaint books, because Nabokov was quite a rascal, although he was still very young at the time. However, it seems that he was Vladimir Vladimirovich, i.e., the discussion could also be about his father. And he, as a political figure, could have signed various petitions en masse.
3. A crazy theory - fallen leaves. At first, I thought it was snow, but then I remembered that it was October 31st, not November.
4. A strange coffin, could it be that it's not Robin Hood?