Writers are commonly taught that one should never end a chapter with a character going to sleep. The thought is that if there is a break in the action that permits the character to sleep, then the reader will be prone to sleep as well. The goal of the writer should be to keep the reader reading, to write a book that is un-put-down-able.
Proust begins his masterpiece with his narrator going to sleep. In minute detail.
We managed six pages last night before quickly dosing off.