On a Cromlech-tumulus called Lugbury, near Littleton Drew. By John Thurnam, M.D., F.S.A.
You can now read Thurman’s article from 1857 at Google Books, where it is scanned in as part of the Wiltshire Archaeology and Natural History Magazine. It’s on p164. There’s also a drawing of the barrow from 1821, which appears to show two upright stones at the far end of the barrow. Maybe this is an elaboration of the engraver’s – 1821 was when Colt Hoare excavated the site. You can’t have five stones in ‘three stone field’ can you??