McLane’s essay responds to the prompts offered by Wickman, Levinson, Brooke-Smith in their inquiries into “Romantic Number.” Using The Jackson Five’s song “ABC” as a kind of ludic case, she draws forth the logic of counting vs. matching, the status of order and seriality, the utility of set-theory for thinking romanticism; she notes as well the increasing interest of scholars in emergent complexity. A final detour through Wallace Stevens mediates her reflections on the status of “the one” and of deixis itself in Romanticism and its afterlives.