Every such claim must be accurately described in a written notice, which must be recorded in the office of the recorder of the county wherein the claim is situated, in a book to be kept for that purpose, together with an affidavit of the claimant setting forth:
(1) That such claim does not embrace more than 320 acres of land.
(2) That he holds no other claim under the provisions of this chapter.
(3) That to the best of his information and belief, no part of said land is claimed under any existing adverse title.