with any of the usual agents used by entomoligists, but for the beginner I would recommend amyl acetate, which is easily and cheaply obtainable. A few drops of this in a glass tube will leave the insects in a relaxed condition for subsequent mounting. To send flies through the post it is best to pack them (unmounted) in a very small box between layers of cellulose wadding: never use cotton wool, since the strands get tangled with legs and wings, to the detriment of the specimens. Send information and specimens to R.M. Payne, 49 Galton Road, Westcliff-on-Sea, Essex. EXCAVATION OF A RED HILL During the summer of 1970 the Colchester Archaeological Group carried out a preliminary investigation of a pre- historic salt making site at Sea Road, near Maldon, Essex. Known locally as Red Hills, these sites are found in large numbers among the creeks and marshes of Essex; but little is known of the method of operation or the duration of active use. Thanks to the co-operation of the farmer and the fortunate period in his crop rotation, we were able to have the use of the site for three months from the beginning of September. Important information was found which included working surfaces, artifacts, Belgic pottery, many sherds of salt drying vessels, a man-made gully for the introduction of sea water and two groups of clay-lined evaporation tanks. A second season of excavation is planned to begin on 1st. August 1972 and digging will go on every day, except Mondays, including weekends. Volunteers are urgently required who need only to be interested; even if they have never dug before, they will soon pick it up and find themselves fully involved. Enquiries to Mrs. K. de Brisay, Corner Cottage, Layer- de-la-Haye, Colchester, C02 OLE. Tel: Layer-de-la-Haye 274 Page 3