County of Welland estimate of work done on the main drain of the marsh lands by Alexander Cook

County of Welland estimate of work done on the main drain of the marsh lands by Alexander Cook, unsigned. Estimate no.24, Aug., 1857.

County of Welland estimate of work done on the main drain of the marsh lands by Alexander Cook

County of Welland estimate of work done on the main drain of the marsh lands by Alexander Cook, unsigned. Estimate no.25, Sept., 1857.

County of Welland estimate of work done on the main drain of the marsh lands by Alexander Cook

County of Welland estimate of work done on the main drain of the marsh lands by Alexander Cook, unsigned. Estimate no.26, Oct., 1857.

County of Welland estimate of work done on the main drain of the marsh lands by Alexander Cook

County of Welland estimate of work done on the main drain of the marsh lands by Alexander Cook, unsigned. Estimate no.27, Nov., 1857.

County of Welland final estimate of work done on the main drain of the marsh lands by Alexander Cook

County of Welland final estimate of work done on the main drain of the marsh lands by Alexander Cook complete with notes and calculations of quantities. This document is unsigned. Estimate no.28, Dec., 1857.