As in the case of like tenons, if there are a number of mortises all alike, set the gage only twice for them all.
In _cutting the mortice_, first fasten the piece so that it will rest solid on the bench.

This may be done either in a tail vise or by a handscrew, or by clamping the bench-hook firmly in the vise in such a way that the cleat of the bench-hook overhangs the piece.

Then tap the bench-hook with a mallet and the piece will be found to be held tightly down on the bench.

See Fig.

76, p.