Note 65 — Chapter II · THE ROMAN PROVINCE IN SCOTLAND.
Reading edition
Trimontium has been identified with the Eildon hills in Roxburghshire, owing simply to the resemblance of the form of the hill with a station supposed to be called the Three Mountains; but it is more probable that the syllable Tri represents the Welsh Tre or Tref, and that it is a rendering of Trefmynydd, or the Town on the Mountain. To place it at the Eildon hills is to do great violence to Ptolemy’s text.