For example, the Canton and Pontcanna areas of Cardiff had a cluster of twenty pin drops while Ely and Pentrebane had one each.
Er enghraifft, roedd ugain o binnau wedi cael eu rhoi yn ardaloedd Treganna a Phontcanna yng Nghaerdydd, a dim ond un yr un a gafodd Trelái a Phentre-baen.