Pencil drawings with measurements of part of the Great Drain ... No 2 Folder I. Eponymous Heroes ... 14 Jun 1968
Pipe from drain of Building F ... John Travlos ... XVII-3 XVII-3 Dirty Cartridge Paper Drafting Ink ... 1936
Collecting basin and drain; plan and section ... J.T.? ... HSR group K.
Plan and section of east branch of Great Drain; unfinished ... John Travlos ... Possibly section Λ? Dirty Cartridge Paper Drafting Ink
