It was in 1965 and in Tulsa Oklahoma but I don't know where it is in the book
Adverb clauses function as adverbs and answer such questions as : when, where, why, under what conditions. They modify verbs, adverb, and adjectives. They also have to begin with a subordinating conjunction as well as contain a subject and a predicate.
Mrs. Sanchez -- subject
will help -- verb
if you ask-- adverb clause modifying the verb " will help " answering the question : under what condition.
The clause <em>when we can rest </em>is a subordinate/dependent clause, meaning that it cannot stand on its own - it has to be a part of a larger, independent clause, as is the case here.
summary because it is the result of him leaving the hard work