A long time ago, there was no such thing as school, and children spent their days learning a trade, a phrase which here means "standing around doing tedious tasks under the instruction of a bossy adult." In time, however, people realized that the children could be allowed to sit, and the first school was invented.
Daniel HandlerYou may want to keep a commonplace book which is a notebook where you can copy parts of books you think are in code, or take notes on a series of events you may have observed that are suspicious, unfortunate, or very dull. Keep your commonplace book in a safe place, such as underneath your bed, or at a nearby dairy.
Daniel HandlerIn the time since the Baudelaire parents' death, most of the Baudelaire orphans' friends had fallen by the wayside, an expression wich here means "they stopped calling, writing, and stopping by to see any of the Baudelaires, making them lonely". You and I, of course, would never do this to any of our grieving acquaintances, but it is a sad truth that when someone has lost a loved one, friends sometimes avoid the person, just when the presence of friends is most needed.
Daniel Handler