1851 Great Exhibition: Official Catalogue: Class VIII.: John Grantham
From Graces Guide
93. GRANTHAM, JOHN, Orange Court, Liverpool — Inventor.
Model of the section of an iron ship, showing an improved method of sheathing the plates with wood, to enable them to be coppered. The sheathing is attached without the use of bolts. The object is to prevent fouling in tropical climates, and to preserve the iron.
Iron model on a larger scale, showing the mode of construction.