In article . com,
DamnYankee wrote:
I thought the "arrows" were called "bolts" when used in a crossbow.
Plans call them "quarrels"? Never heard that term before.

When you get down to the nuts-and-bolts of it, a quarrel is a particular
kind of an arrow -- one having a squared-off head.

A bolt is also a particular kind of an arrow -- one that is characterized
by having a short and heavy shaft., as is typically used in a cross-bow.