 “Holes” (Lewis and Lewis 1970) was co-written with Stephanie Lewis. In it they discuss, in dialog form, some of the metaphysical issues that holes generate. One of the characters, Argle, wants to eliminate holes from his ontology, and the paper goes over what costs must be met to make this form of  nominalism  work. The other character, Bargle, pushes Argle to clarify his commitments, and in doing so draws out many details of the nominalist framework. The case is of some interest in itself, but it is also, as the authors note at the end, a useful case-study in the kind of moves nominalists can make in eliminating unwanted ontology, and the costs of those moves.