| CRA6/5/3 | Tables for Engineers, Inspectors, Platelayers etc. A foldout set of three tables giving the mathematics for curves, with offsets, and super-elevation. Signature of holder James M. Kerr 20/03/1903 | c1903 |
| CRA6/5/3 | Tables for Engineers, Inspectors, Platelayers etc. A foldout set of three tables giving the mathematics for curves, with offsets, and super-elevation. Signature of holder James M. Kerr 20/03/1903 | c1903 |