Physical description
Report - four foolscap sheets, clipped in top left hand corner titled "Yoke Frames for Supporting line pulleys in tunnel", dated 18/10/1916 by Mr. P. J. Pringle for the Tramway Board. Report on issues with the cable tramway yokes looking at the problems with wear, cracking, dimensions, and depth that the grip could run. Noted differences between the south and north sides of the system. Work done by Mr Blackwell and Mr. Watt. Has two sheets of tables listing the problems.