Conversation so far:
What conspiracy was Mary Surratt involved in?
conspiracy to kidnap Lincoln.
Did she have co-conspirators?
Confederate agents began frequenting the boarding house.
Booth visited the boarding house many times over the next few months, sometimes at Mary's request.
Did she help booth?
Shortly before she left the city, Booth visited the boarding house and spoke privately with her.
He gave her a package.
what was in the package?
binoculars.

Question: what were the binoculars for?
Self-contained rewrite: what were the binoculars for that Booth gave to Mary Surratt?