PERTHSHIRE, Scotland - History and Description, 1868
"PERTHSHIRE, an extensive inland county in the centre of
Scotland, lying between 56° 41 and 56° 57' N. lat., and between
3° 4' and 4° 50' W. long. It lies on the Highland border,
connecting the northern Highlands with the southern Lowlands,
and the Highlands of the W. with the Lowlands on the E., thus
comprising almost every variety of soil and climate to be found
in Scotland. Its geographical boundaries are for the most part
defined by natural barriers of lofty mountain ranges, forming
parts of the northern and western Grampians and of the Ochill
hills. On the N. and N.W. it is bounded by the counties of
Aberdeen and Inverness; on the E. by Forfarshire; on the S.E. by
Fifeshire, the Frith of Tay, and Kinross-shire; on the S. by
Clackmannan and Stirling shires; on the S.W. by Stirling and
Dumbarton shires; and on the W. by Argyllshire. The form of the
county is compact, but a small section of it, comprising the
parishes of Culross and Tulliallan, on the N.