HEAD-BORROW, or HEAD-BOROUGH, signifies the person who is the chief of the frank pledge, and had anciently the principal direction of those within his own pledge. He was also called barrow-head, bar-boulder, now borholder, third-borow, tything-man, chief pledge, and borrow-elder, according to the diversity of speech in different places. This office is now usually called a high-custodian. The head-borow was the chief of ten pledges: the other nine were called hand-borrows, or pledgi-manualis, &c.