The house and grounds, and furniture, were approved, the Crofts were approved, terms, time, every thing, and every body, was right; and Mr. Shepherd's clerks were set to work, without there having been a single preliminary difference to modify of all that "This indenture sheweth." (ch. 5)

I'm interested in the way "This indenture sheweth" is in quotes. I assume it's part of the legal language of the rental agreement? Just how detailed did these agreements get?