Closeup of the matured eschar after the second application of black salve 7 days after the first. It hasn't started to detach yet, but the sides will soon separate and the "scab" will be held on by roots which start out as a thick mass which then become defined and then seem to absorb up into the eschar. If they break off before this stage, they are left in the tissue and have to be pursued through another application of salve. Roots grow.