The corners should be brought well together, using a rawhide hammer, No. 1, Plate 2.
A rawhide hammer should be used to avoid marks on the face of the corner.
If the face is somewhat irregular, it can be trued up by placing it on a block of wood and going over it with a rawhide hammer.
The piece is again placed over the metal and, with a rawhide hammer, worked into shape.