An Historical Atlas of Oxfordshire. Edited by Kate Tiller and Giles Darkes. 280mm. Pp xii+193, 74 maps and a few b&w ills. Oxfordshire Record Society, 67, Oxford, 2010. ISBN 9780902509634. £20 (pbk).An Historical Atlas of Hertfordshire. Edited by David Short. 330mm. Pp xx+204, many col maps and 30 ills, some col. Hatfield: Hertfordshire Publications, University of Hertfordshire Press, 2011. ISBN 9780954218966. £25 (pbk).