The bosom slit reinforcement can be reinforced in so many ways. This one has one simple bar tack at the top and a network of thread below. It appears as though this is made of a slightly heavier thread than the other sewing on the shirt. Interestingly the bosom slit is sewn with the same size hem as the rest of the shirt. The hem is close to 1/8 inch. — with Tony Holbrook at Department of the Geographer to the Army, 1777-1783.