THE CONGLOMERATE TRACK 31 Grid references Feature Authority, etc. 52/882718 Livermere stone Under tree, south of churchyard 52/869832 Thetford stones Each side of Little Ouse ford 52/865845 Gallows Hill 52/845874 Twomile Bottom 52/817896 Grimes Graves stone In "Claypit" 52/782949 Cranwich Church 53/767093 Cowell stone West of Swaffham 53/748176 Gallow Hill 53/733193 Gayton stone Behind "Mill Stores" 53/722221 Grimstone stone Wall of house in village 53/691328 Ingoldisthorpe Church 53/691344 Snettisham stone Ruins of old church 53/682380 Heacham stone (1) Buttress of Church tower 53/679372 Heacham stone (2) Behind schoolhouse Acknowledgment is gratefully made to the following for their invaluable assistance : Mrs. M. Pilcher, for sections of the Berkshire track ; Mr. L. S. Harley, B.Sc, for the Thetford Ford Stones ; Mr. W. Tyrrell, for the Cowell Stone and the Magdalen Laver Manor Stone; Mr. Gamester, for the Thurston Stone ; ana Mr. H. B. Kemsley, for historical details of Epping Upland, and for the Cross Keys Stone. REFERENCES 1. Rudge, E. A. and E. L. 1950. Evidence for a Neolithic Trackway in Essex. Essex Naturalist, 28, 172. 2. Clark, J. G. D. 1932. The Mesolithic Age in Britain. Cambridge Univer- sity Press, p. 65. 3. Loc. cit., p. 67. 4. Wheeler, R. E. A Prehistoric Metropolis. Antiquity. 1932. 5. Salter, A. E. Sarsens in Hertfordshire. Trans. Herts. Naturalist Society, 14, 135. 6. Report of the Committee on Erratic Blocks. British Association Reports, 1885, p. 324. 7. Hill, Copinger. The Peddar Way in Suffolk. Suffolk Archaeology, 18, 211. 8. Report on the Excavations at Grimes Graves. Proc. Prehistoric Soc. of East Anglia, 2(1915). 9. Ekwall, E. 1951. Oxford Dictionary of Place Names. Clarendon Press. 10. Recent Researches at Grimes Graves. Proc. Prehistoric Soc. of East Anglia, 5 (1925), 91. 11. Clark, J. G. D. See (2) above. 12. Brooks, C. E. P. The Climate of Prehistoric Britain. Antiquity. 1927, p. 412.