* "Innumerable follies": This phrase indicates that the narrator was consumed by countless foolish thoughts and actions.
* "laid waste...waking and sleeping thoughts": This means these follies dominated the narrator's entire mental state, both when awake and asleep.
* "wished to annihilate the tedious intervening days": The narrator wants to erase the time that has passed since the evening in question, suggesting a desperate desire to undo the consequences of their actions or choices.
In short, the narrator is overwhelmed with remorse and wishes they could go back in time and change what happened on that evening.
This quote suggests a dramatic and potentially tragic situation. To understand the full context and the specific nature of the "follies," you'd need more information about the story or character's background.