Documents relating to the construction of bridges. Engineers' drawing for the bridge on Blacktown Rd near Richmond, 1870. Enclosed in Mylar; Engineers' drawing for the chain of Ponds creek bridge, 1868. Enclosed in Mylar; Specification for the bridge at the chain of Ponds creek. Enclosed in Mylar; & two receipts relating to the above drawings. All signed by Donald MacPherson. Enclosed in Mylar.