A Manual of the Principles and Practice of Road-Making: Full text of Gillespie's book which was published in 1864.A Treatise on Land Surveying: Comprising the theory developed from five elementary principles; and the practice with the chain alone, the compass, the transit, the theodolite, the plane table. Full text published in 1855.Notes on the Strength of Materials and the Stability of Structures: Gillespies 1870 notes printed for the civil engineering classes in Union College.Union College Math Department History - 1826 - 1877: Short commentary on Gillespie years at Union College.