An escroll is a strip of parchment or paper, frequently with writing upon it, transfixed or held in place by a larger charge. By its definition, it can never be used alone, or as a primary charge. The escroll is a period charge, used in the arms of Sir Roger de Clarendon, d.1402 [Parker 238]. It has no default orientation, though it is usually assumed to be at right angles to whatever charge is transfixing it.
Ieuan Gower bears: Sable, an ostrich feather transfixing an escroll fesswise between in bend sinister two mullets Or.