consideration hereinafter mentioned they will at their own expense and
risk perform and execute the work upon the Casa Grande ruin, described
and specified in the specification hereto annexed and forming a part
hereof, in the manner and with the conditions specified, items of said
work to be as follows:

Item No. 1. Clearing out the débris: To excavate and remove 350 cubic
yards of earth and débris, or less, as specified, amount of excavation
not to exceed 350 cubic yards.

Item No. 2. Underpinning walls: To underpin the walls as specified,
requiring 750 cubic feet of brick masonry, or less, amount of masonry
not to exceed 750 cubic feet.

Item No. 3. Filling in cavities: To fill in cavities and openings as
specified, 500 lineal feet of 2 by 4 inches squared lumber and 800 cubic
feet of masonry, or less, whole amount of filling not to exceed 825
cubic feet.

Item No. 4. To brace the walls as specified in the annexed plan and
specifications.

Items numbered five and six of the specifications hereto annexed,
together with the plans, specifications, and conditions pertaining
especially and only to them and not to the other items, are omitted.

The said parties of the first part further contract and agree to deliver
over the work, completed and finished, to such person as the Secretary
of the Interior may designate, within two months after receipt of notice
that this contract has been approved by the Secretary of the Interior.