A pen is a tool for writing or drawing with ink. The most common form of pen in heraldry is the “quill pen”, sometimes misleadingly (and wrongly) blazoned simply a “quill”; it’s found in the canting arms of Coupens c.1312 [ANA2 514]. The quill pen is the default form of pen for Society use; the illustration is taken from Bossewell, 1572 [III.4v]. But other types of pen are also found in Society armory, most notably the “reed pen” or “calamus”; this is simply a tubular reed with a split point at one end. It’s similar to the pens found in the arms of Hales, c.1520 [Woodcock & Robinson pl.13].
The Chronicler bears: Per pale sable and argent, two quills conjoined in pile counterchanged, a chief gules.
Elizabeth Bellclerke bears: Azure, in fess three quill pens bendwise sinister argent.
Catharine Hawkwod da Barbiano bears: Or, six quill pens azure.
Thomas Megatherium of Castle Leviathan bears: Per pale purpure and sable, a reed pen palewise Or surmounted by an anvil argent.