to you the amount and character of the work accomplished, certifying
the amount due the contractors under each item, I have the honor to
submit the following report:

I visited the ruin first on October 20, and found the work well
advanced. Steady progress was made from said date until October 31,
the limitation expressed in the contract for prosecuting it.

In order to ascertain the exact location of Casa Grande ruin and to
aid me in the determination of the amount of work performed by the
contractors, I employed Mr Albert T. Colton, a civil engineer and
the official surveyor of Pinal county, Arizona, within the limits of
which the ruin stands. From actual measurements made by Mr Colton,
based upon official notes in his custody, he informed me the ruin
was located in the northeast corner of the northwest quarter of the
southwest quarter of section 16 of township 5 south, range 8 east. A
congressional township plat on which Mr Colton has marked the exact
location of the ruin is filed herewith, marked Exhibit A, and made a
part of this report [plate CXXV].

On October 29 Mr Colton at my instance took measurements of the
brickwork in underpinning and filling in cavities in the walls and
of the excavation done by the contractors. His estimate, based upon
these measurements, was submitted to me in writing. It is filed
herewith, marked Exhibit B, and is made a part of this report.

I find from these measurements that the contractors excavated and
removed to a point 100 yards from the ruin 570 cubic yards of
débris, 271 cubic yards of which were removed from the interior and
299 cubic yards from the exterior walls of the building, within an