Report of the engineer to the directors of the Andover and Haverhill Rail Road Corporation on the subject of the location of the proposed bridge over the Merrimack at Haverhill, December 15, 1838 - Hayward, James (Printed by Gould and Newman, 1838)
Goldsmiths'-Kress no. 30536.11. - OCLC, 17958295. - Reproduction of original from Kress Library of Business and Economics, Harvard University. - Signed: James Hayward