Brief handwritten note to M M O'Shaughnessy, requesting a meeting regarding the location of a tree in Tulare County. The note is written on the back of subscription slip for California Midwinter International Exposition. Signature [Sloss].

File of copy letters to M M O'Shaughnessy offering their congratulations on his appointment as City Engineer of San Francisco. Correspondents are W J Farey, Ed L Head, C Eccles, Ford A Carpenter, A Moretti, G McM Ross, John E Pope, Emilie Sussman, M K Miller, Herman Shainwald, Charles D Martin, Thomas W Brooks, R C O'Connor, W A Whitney, Otto von Geldern, James P Morrissey, R S Buck, R S Moore, Frank McGowan, Victor Reiter, Charles E Wilson (5 copies), L B Nutting, A L Young, Walter V Bowns, J D Grant, Francis Smith, Ernest McCullough, W W Ricker, a copy of the Dedicatory Ceremonies to Commemorate the Completion of the Mission Viaduct, Henry Michaels.

Copy letter from O'Shaughnessy to Mr Stromberg, Photographer, (26 Oct 1912) requesting copies of a photograph. Copy letter to O'Shaughnessy from A S Baldwin (25 Aug 1913) complimenting him on his editorial in the Journal of Commerce in favour of the bond election, the influence it has exerted on his own position on the matter, but notes his opposition to municipal ownership of street railroads.

Sepia photograph of a group of approximately 30 people, men, women, children, and servicemen, all smiling and looking at another camera. M M O'Shaughnessy is standing at the front and centre of the group, smiling. The group appear to be standing on a piece of railway line, surrounded by rubble. The occasion is the opening of the Twin Peaks Tunnel.

Black and white photograph of a large group of men and women having a picnic in the San Mateo Recreation Park.

Black and white photograph of a picnic area in the San Mateo Recreation Park.

Black and white group photograph captioned Bayshore Boulevard, Visitacion Valley. It shows a large crowd spectating, with a marching band setting up their instruments in the background.

Six black and white photographs of the O'Shaughnessy dam.

Typescript manuscript of a Memoir written by M M O'Shaughnessy, with some handwritten corrections. The cover page is marked 'Old Copy'. The piece is divided into chapters, but also the entries are dated, reflecting that O'Shaughnessy began writing his memoir in 1894, but took frequent breaks from it, and worked on it at various times over the subsequent 30 years. It covers his childhood in Loughill, Co. Limerick, his University education,

M M O'Shaughnessy's personalised Christmas card for 1920 featuring an image of Ocean Bay seawall.

M M O'Shaughnessy's personalised Christmas card for 1928 featuring an image of him relaxing in Muir Woods. 1928 was at the height of the controversy over the Hetch Hetchy plan.