It will have been seen that the Roman historians give us almost no clue to what we now deem of most interest and importance, the place of the early inhabitants among the families of men, the time and manner of their arrival, the language they spoke, and their internal history generally. Of course the records of contemporaries stand in the first place of importance as evidences, and although we have other sources, historical, linguistic, and antiquarian, which shed a little light upon the subject, these, for various reasons, must be used with great caution. The only statement approaching to anything like a hint as to the origin of the Caledonians is that of Tacitus, referring to their ruddy locks and large limbs as an evidence of their German origin. There is no reason to doubt that those with whom Agricola came in contact were of this make and complexion, which, at the present day, are generally held to be indicative of a Teutonic origin; whereas the true Celt is popularly believed to be of a small make and dark complexion.[37] It may have been, that in Agricola’s time the part of the country into which he penetrated was occupied by considerable numbers of Teutons, who had effected a settlement either by force, or by favour of the prior inhabitants. The statement of Tacitus, however, those who uphold the Celtic theory endeavour to explain away. We may safely say then, that with regard to all the most important points that have excited the curiosity of modern enquirers, the only contemporary historians to whom we can appeal, leave us almost entirely in the dark.