Series of Unfortunate Events, A Easter Egg - Clues (Spoilers!)

In the back of the books there are clues to what the next book will be.
1-Snake around the lampost.(reference to the snakes in the reptile room)
2-A sign that says some thing about Lake Lacrymose. (reference to the setting)
3-An optomotrist's office in the background.(reference to the optomotrist who hypnotises Klaus)
4-a school bus in background. (reference to the school the orphans are going to)
5-A herring on the liscence plate (reference to where the Quagmire twins are hidden)
6-crow in the sky (reference to the Village of Fowl Devotees
7- A paper for the Last Chance market (where the baudelaires get chased)
8-A Madame Lulu pamphlet. (reference to well, Madame Lulu)
9-Snow Scout hand book. (reference to the snow scouts)
10-Mushrooms on the rock. (reference to the mushrooms in book 11, which i happen to forget the name of.
11-The little bell boy hats with
Hotel D on them. (reference to the baudelair's disguise and setting)
12-Anyone know?