Said commission shall make report to the secretary of internal affairs on the progress of the work, with an account of all expenditures, which shall be transmitted by said secretary to the general assembly at its next session, and said commission shall on completion of said work, prepare and file in the department of internal affairs a full report of their proceedings, accompanied with such maps or drafts as may be necessary to a clear understanding of the same.
71 P.S. § 1854