This was the 'Garry Project' for the design of a Quoick surge shaft, for Sir William Halcrow and Partners.

Bundle of notes and calculations relating to the project from Sir William Halcrow and Partners, December 1951-January 1952.

Manuscript and typescript versions of Strachey's description of 'Surge Shaft routine' and 'Fundamental equations'.

Eight bundles of notes, calculations, routines.