True Mortise Work
: AN ANALYSIS OF TENONING, MORTISING, RABBETING AND BEADING
The essense of good joining work is the ability to sink the chisel true with the side of the member. More uneven work is produced by haste than by inability. The tendency of all beginners is to strike the chisel too hard, in order the more quickly to get down to the bottom of the mortise. Hence, bad work follows.