Asyndetic pairs dependent on a single preposition have tended to be treated as problematic by editors and scribes, and manuscript variations are not unusual. I have not, however, noted explicit discussions of the issue by editors (see however Preuss 1881: 53). The criteria that may be used by an editor in judging possible cases of asyndeton include structural factors, and an author’s practice elsewhere. I start with a structural pattern and variants, and then refer to two possible asyndeta of this type in Caesar’s Bellum ciuile, which are dealt with in detail in XVIII. Finally, I consider possible examples in several other writers.