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A recent study by Daniel Aldea of the University of Pennsylvania and his colleagues found that repeated mutations of a gene called Engrailed 1 may have led to this abundance of eccrine sweat glands.

When they created a wound on the back, they found that only one of two lineages of fibroblast — expressing homeobox protein engrailed-1 — was responsible for the formation of most scar tissue.

Lines.—Eleven varieties of lines, other than straight lines, which divide the shield, or edge our cheverons, pales, bars and the like, are pictured in the heraldry books and named as engrailed, embattled, indented, invected, wavy or undy, nebuly, dancetty, raguly, potent�, dovetailed and urdy.

The most commonly found is the line engrailed, which for the student of medieval armory must be associated with the line indented.

Thus the engrailed cross of the Mohuns takes either of the two forms which we illustrate.