On Thu, Mar 12, 2015 at 10:52 PM, adam vogt <vogt.adam at gmail.com> wrote: > Adding this instance lets your example work: > > instance Show1 BankersDeque where showsPrec1 = showsPrec Ah, now it makes sense. Thank you very much for your help! Cheers, Mark Laws -- |v\ /\ |\ |< |_ /\ \^| //