In these ages or periods, mankind found a home in the caves of North Yorkshire, at Kirkdale and on both sides of Cresswell Craggs, the boundary line between Nottinghamshire and Derbyshire. Quite recently[3] discoveries have been made at Upper Langwith, also on the borders of the two counties, Nottinghamshire and Derbyshire, showing unmistakable signs of Cave Man dwellings and handiwork. While these places are not far geographically from Lincolnshire, yet, to be accurate, no trace of Cave Man or River Drift Man has been found in what is now the county of Lincolnshire.[4] THE NEOLITHIC PERIOD It is in this period we first find traces of mankind in Lincolnshire. Various burial places and many finds of implements show how widely Neolithic Man spread over and occupied the county. These implements are described as stone axes, spear-heads, lance-heads, arrow-heads, scrapers, gouges, chisels, pot-boilers, knives, borers, graving tools, hammer stones, whetstones, polishers, sink stones, anvil stones. A list of the places where these “finds” have been recorded is as follows:— *Alkborough. Barlings. *Billinghay. Branston. Brigg. Broughton. *Burwell. *Bully Hill. Caythorpe. Claxby, near Alford (flint flakes). Cold Harbour. *Cold Hanworth. Crowle. Coningsby Warren. Coxey Hills, near Louth. Doddington. Donington-on-Bain. Elkington, South. Fiskerton. Fotherby. Friskney. Ferriby, South. Gonerby. Gonerby, Little. *Haxey. Healing (arrow-head). Horncastle. Hubbard’s Hills, Louth. Irby. *Isle of Axholme. Keal, West (arrow-heads). Kelstern. Kirkstead (axe-head). Kirton-in-Lindsey. *Legbourn. *Lincoln. *Lynwode. *Mablethorpe. Maidenwell. Manton. Messingham. Newport, Lincoln. Nocton (axe-head). Ponton, Great. Potterhanworth. Reepham. *Ruckland. *Salmonby. Saxilby. *Scawby. *Scunthorpe (arrow-heads). Sleaford. Spalding (spear-head). Stewton. *Stow. Tathwell. Tetford (arrow-heads). Welton, by Lincoln (whetstone). Wragby. Woodhall. *Witham River. Those marked with an asterisk (*) are to be seen in the County Museum at Lincoln. Many of these implements are excellent specimens of the art and skill of the Neolithic workers in stone. For the purpose for which they were made, they seem to have served well. The axe-heads have been (in some cases) made to be used with wood handles formed out of the branches of trees. In the course of ages the handles have perished, but the stone implement remains. Often people unacquainted with the subject of stone implements ask, “How do these stone implements differ from stone forms of natural shape?” There are several points for students to notice about “Worked Stone Implements.” The points to be noticed with the Old Stone or Paleolithic Implements are as follows:—