One who keeps accounts, or casts up accounts by counters. Thus, in The Winter’s Tale, the Clown says, “Fifteen hundred shorn; what comes the wool to? I cannot do ʹt without counters.” (Act iv. s. 3.)
Forsooth, a great arithmetician, …
And I … must be beleeʹd and calmed
By debitor and creditor, this counter-caster.”