The reader of the Letters of Synesius will soon perceive that Synesius tends, with surprising frequency, to repeat combinations of words and phrases which he has used elsewhere, both in letters and in occasional speeches. Although this habit has on occasion received scholarly attention, it has not yet been subjected to systematic analysis. My method, in undertaking this task, will be first to present the evidence in the form of an exhaustive list of examples. This will be followed by a brief discussion of the significance of the repetitions for our understanding of the Letter collection as a whole.