Bradford, realizing the archaeological value of the millions of air-photographs taken during the war by the British and American Strategic Air Commands, prevailed upon the authorities to deposit prints, giving complete coverage for Italy, in Rome (with the British and Swedish Schools) and the American Academy. The initiative of Prof. Kirk H. Stone procured a similar set for the University of Wisconsin. The stereoscopic study of these collections will mean great strides in Italian archaeology. The accuracy of the data obtained is amazing: ditches estimated from the photographs with a good micrometer scale to be four feet wide proved when measured on the ground to be precisely that. What the photographs revealed, scattered over the 1650 square miles of the Tavoliere, were over 2000 settlements, some up to 800 yards across, surrounded by one to eight ditches. Within the ditched area, and approached by in-turned, tunnel-shaped entrances, were smaller, circular patches, which looked like hut-enclosures, or “compounds.” Three examples of the sites photographed will illustrate typical settlements. At a site identified on the map (Fig. 1.1) as San Fuoco d’Angelone, eight miles northeast of Foggia, the photographs showed a ditch-enclosed oval measuring 500 × 400 feet, and an inner circle 260 feet across, with what proved to be the characteristic funnel-shaped opening. At Masseria Fongo, four miles south of Foggia, the oval was estimated at 480 yards long, with a 12-foot entrance and 12-foot ditches. At Passo di Corvo (Fig. 1.2), eight miles northeast of Foggia, the enclosure measured 800 × 500 yards, and the details were revealed by masses of flowers, yellow wild cabbage, mauve wild mint, white cow-parsley. So much for results from the study of photographs. The next step for Bradford was to spend a fruitful season in the study. Archaeology is a comparative science: to know one site is to know nothing; to know a thousand is to see some factors unifying all. Thus the settlement-shapes of the Tavoliere are reminiscent of the fortified stronghold of Dimini in Thessaly (Fig. 1.3), dated by its excavation in the late neolithic age, which in Greece means about 2650 B.C. They also look like the fortified site of Altheim near Munich (Fig. 1.4), also late neolithic, which in Germany means about 1900 B.C. Culture in Europe moved from east to west; in general the farther west the site, the later it reached its successive levels of culture. The Tavoliere sites, lying geographically between Dimini and Altheim, might well be intermediate in date also; by their shape, at any rate, they are almost certainly to be dated sometime in the neolithic period. So much can be guessed before the indispensable next step is taken. The next step is excavation. [Illustration: _Prehistoric Sites in Italy_