Conversation so far:
what conspiracy was Mary Surratt involved in?
She said that she made the trip to collect a debt owed her.
what debt was she collecting?
owed her by a former neighbor.
why was this a conspiracy?
according to her tenant, John Lloyd, Surratt told him to get the "shooting irons" ready to be picked up.
who wanted the shooting irons?
according to Lloyd, again told Lloyd to have the "shooting irons" ready for pickup and handed him a wrapped package from Booth.
was she accused of helping john wilkes booth?
He gave her a package, later found to contain binoculars, for Lloyd to pick up later that evening.

Question: how did she know booth?
Self-contained rewrite: how did Mary Surratt know john wilkes booth?