Herodotus, writing in 443 B.C., says that the Greeks acquired their knowledge of the sundial from the Babylonians; the Roman writers in turn give evidence of their acquisition of this instrument from the Greeks. Although the Romans were backward in the science of gnomonics and slow to adopt any particular form of horologe, they eventually constructed many a beautiful dial of varied design. The first sundial was erected in Rome in the year 290 B.C., this being taken from the Samnites by Papirius Cursor. Another was brought to Rome by Valerius Messala from Catania 261 B.C., but it was not until 164 B.C. that, as far as we know, a dial constructed at Rome was set up by order of Q. Marcius Philippus. Cicero, writing in 48 B.C. to Tiro, mentions that he wished to place a sundial at his villa in Tusculum, and at a later date we see Romans erecting sundials in every possible corner of their villas and grounds. The first known dial in Britain, with the exception of the one or two reputed Roman dials discovered in this country, are those of Saxon origin found on some of our ancient churches. As far as we know nearly all the earliest mural examples are semicircular, and although the spaces into which the dial is divided vary considerably in number and size, they seem to point to the practice of the early Norsemen dividing time into tides. And since it is known that they apportioned the time into eight tides, and that the oldest horologes have the fewest spaces, it seems more than likely that many dials so marked owe their existence to these hardy invaders. Bede (our earliest historian) records the fact that the hours were shorter or longer according to the seasons, and this testimony is borne out by existing dials, generally found built into ancient buildings, on the sides of porches, and the jambs of windows. I myself discovered one, only two feet off the ground, built into the east side of an old Norman south porch, and the fact that the dial had been cut in order to fit the stone into its place—added to its position—showed very plainly that it had been taken out of an earlier building and used again. Without hazarding any date as to the earliest form of horologe in this country, I would but testify from my own experience that many dials of early workmanship actually exist unnoticed on many of our ancient buildings, principally churches. A close and careful examination of the walls of such would, I am sure, reveal many a time-worn horologe of the past. Generally they are found on faced stones built into porches, windows, and corners of buildings, and consist of circles and half-circles, divided by lines which radiate from a hole in the centre to the circumference. The number of lines differ considerably and the spaces are also of unequal size.