1. _Prehistoric._--_Paleolithic_ man--in whom we are all so interested, but of whom we know so little--must have dwelt in Hertfordshire for a long period, a period to be measured by centuries rather than by years. Perhaps, however, the word "dwelt" is hardly appropriate here; for doubtless, for the most part, the rude flint-shaper and skin-clad hunter roamed at random over this tract of land wherever necessity led him. It is usual to speak of him as a troglodyte, or cave-dweller, but the caves of Hertfordshire are, and probably _were_ few, and his life in such a district would therefore be more than usually nomadic. As is often the case, we find traces of him in the river-valleys more frequently than elsewhere, and it is in beds of clay, conjectured to be of lacustrine origin, that we find those rudely shapen flint nodules which served him for tools. Such implements have been found in the Valley of the Gade by Sir John Evans, K.C.B.; in more central neighbourhoods by Mr. Worthington G. Smith; and many axes, knives, etc., were discovered only a few years ago near Hitchin. Implements of the _Neolithic_ Age are naturally more numerous and form in themselves an interesting study in the evolution of manual skill. Flint axe-heads, wonderfully polished, have been found at Albury, Abbot's Langley, Panshanger and Ware; chipped flints of more fragmentary character have been found near St. Albans and elsewhere; flint arrow-heads were discovered at Tring Grove nearly 170 years ago. The great number of natural flints found in the county make it very difficult to recognise these archaeological treasures, many of which must thus escape detection and be destroyed. Some details of the discovery of Prehistoric implements are given in the Gazetteer.