"BUCKINGHAMSHIRE, or BUCKS, an inland county; bounded on the NW
and N by Northamptonshire; on the NE by Beds; on the E by Beds and Herts;
on the SE by Middlesex; on the S and SW by Berks; and on the W by Oxfordshire.
It has an irregular outline; but forms, on the whole, a slender oblong,
lying N and S. Its only natural boundaries are the river Thames, dividing
it from Berks, and a few miles of other streams, dividing it from parts
of other counties." from Imperial Gazatteer of England & Wales, 1866-9