This little book has at any rate the justification that it is the first or almost the first attempt to present the subject with any fullness to English readers. The only exception known to me is an article by Julius Hare on 'The Names of the Days of the Week,' in the Philological Museum of 1830. That article is longer than my own treatise and is distinguished throughout by great learning, but it covers very different ground, to say nothing of the fact that additional sources of knowledge have naturally become available in the course of almost a century. I myself wrote a few pages on the subject in the course of some notes on Justin Martyr in the Journal of Theological Studies of January, 1922, and at the end of these I remarked that I had met with no good monograph on the Week, and that what I had written was put forward as much in the hope of eliciting as of giving information. That hope has been disappointed, but since then I have come across a great deal of German work which has added much to my knowledge. Of this the most noteworthy items are substantial articles by Schürer, by Jensen and others and by Boll, to which references are given on pp. 20, 45 and 58. To these I might add Maass' Tagesgötter, though I have not had occasion to quote it.
