Three north-and-south sections to show estimated amount of excavation necessary. [Plate CXIX of this report.] Plan showing roof support. [Plate CXXII of this report.] Two sections showing roof support. [Plate CXXIII and plate CXXIV of this report.] IV. OATH OF DISINTERESTEDNESS I do solemnly swear that the copy of contract hereunto annexed is an exact copy of contract made by me personally with Theodore Louis Stouffer and Frederick Emerson White; that I made the same fairly, without any benefit or advantage to myself, or allowing any such benefit or advantage corruptly to the said Theodore Louis Stouffer and Frederick Emerson White, or to any other person or persons; and that the papers accompanying include all those relating to the said contract, as required by the statute, in such case made and provided. (Signed) Cosmos Mindeleff. Sworn to and subscribed before me at Washington, D.C., this 18th day of July, 1891. [SEAL] (Signed) Jno. D. McChesney, _Notary Public_. V. BIDS I Bid for repairs on the Casa Grande ruins, in Pinal County, Arizona, bidders to furnish all labor and materials according to specifications: Item No. 1. Cleaning out debris, 60 cents per cubic yard. Item No. 2. Underpinning walls, $1 per cubic foot. Item No. 3. Filling in openings, $1 per cubic foot. Item No. 4. Bracing walls, $200. Item No. 5. Wire fence, 3 cents per foot complete. Item No. 6. Roof, $2,000. (Signed) T. L. Stouffer. F. E. White. Florence, Arizona, _January 28, 1891_. II Bid for putting a roof on the Casa Grande ruins as per plans and specifications furnished, $3,000. (Signed) C. D. Henry. III Bid for fencing in the Casa Grande ruins: Furnishing the posts and barbed wire, for 100 feet of fence, $7 per 100 feet. (Signed) C. D. Henry. IV Bids for restoring the Casa Grande ruins: First. Removing debris from interior of the ruins, 320 cubic yards, more or less, $1 per yard; 140 cubic yards from exterior of the ruins, at 60 cents per yard. Second. Eight hundred cubic feet of brick masonry underpinning, more or less, at $1.30 per cubic foot. Third. One thousand cubic feet, more or less, of brick masonry to fill in cavities, at $1.40 per cubic foot. Fourth. Bracing walls, as per plans, $120. Fifth. Five hundred lineal feet of 2 by 4 square timber at 8 cents per foot, lumber measure. (Signed) C. D. Henry. V Phoenix, Arizona, _February 11, 1891_. Cosmos Mindeleff, Esq., _Tempe, Arizona_. Dear Sir: I hereby submit for your consideration, in reference to the plans and specifications for the preservation of the Casa Grande ruins of Arizona, bids upon the following propositions, to wit: First. "Cleaning out the debris." For the removal of 470 cubic yards of material, more or less, at $2.65 per cubic yard.