In the designation of the intervening hollows, or low land, the variety of expression is naturally less striking. _Glen_ serves for almost all varieties of a narrow Highland valley. A very narrow rent or fissured gorge is called a _glachd_. The English word _dale_, in Gaelic _dail_, means in that language simply a field, or flat stretch of land at the bottom of the hills. It is to be noted, however, that this word is both Celtic and Teutonic; but, in topographical etymology, with a difference distinctly indicative of a twofold origin. In an inland locality where the Scandinavians never penetrated, _Dal_ is always prefixed to the other element of the designation, as in DALWHINNIE, DALNACARDOCH, and DALNASPIDAL, the field of meeting, the field of the smithy, and the field of the hospital, all in succession within a short distance on the road between the Spey uplands and Blair Athol. On the other hand, a postfixed _dale_, as in BORROWDALE, EASDALE, and not a few others, indicates a Saxon or Norse origin. The word _den_ or _dean_, as in the DEAN BRIDGE, Edinburgh, and the DEN BURN, Aberdeen, is Anglo-Saxon _denn_, and appears in the English TENTERDEN, and some others. Another Celtic name for field is _ach_, the Latin _ag-er_, which appears in a number of Highland places, as in ACH-NA-CLOICHE (stone field), in Argyleshire. A hollow surrounded by mountains is called by the well-known name of LAGGAN, which is properly a diminutive from _lag_, in Greek λάκκος, in Latin _lacus_, a hollow filled with water, and in German a mere _loch_, or hole, into which a mouse might creep. A special kind of hollow, lying between the outstretched arms of a big Ben, and opening at one end into the vale below, is called in Gaelic _coire_, literally a cauldron--a word which the genius of Walter Scott has made a permanent possession of the English language. In England such mountain hollows are often denominated _combs_, as in ADDISCOMBE, ASHCOMB, a venerable old British word of uncorrupted Cornish descent, and which, so far as I know, does not appear in Scottish topography, unless it be in CUMMERTREES (on the shore, _traigh_), near Annan, and CUMBERNAULD; but this I am not able to verify by local knowledge. The word _cumar_ appears in O’Reilly’s Irish dictionary as “the bed of a large river or a narrow sea, a hollow generally,” but seems quite obsolete in the spoken Gaelic of to-day. The termination _holm_ is well-known both in English and Scotch names, and proclaims itself as characteristically Scandinavian, in the beautiful metropolis of the Swedes. In Gaelic districts a holm, that is, a low watery meadow, is generally called a _lon_, a word which has retained its place in Scotch as _loan_--LOANING, LOANHEAD, LOANEND, and is fundamentally identical with the English _lane_ and _lawn_. The varieties of sea-coast are expressed by the words _traigh_, _cladach_, _camus_, _corran_, _wick_, _loch_, _rutha_, _ross_, _caolas_, _stron_, _salen_, among which, in