INVERESK Musselburgh, Scotland.  Roman fort and settlement
guarding a harbor at the point where the roads from York and
Chester converged on the Firth of Forth. In 1565 part of a
structure with a hypocaust and an altar dedicated by an imperial
procurator were discovered, and later an external bath house E
of the parish church, but it was not until 1946 that excavation
in the graveyard located the fort itself.  Measuring ca. 182 by
144 m over-all (2.7 ha), it was defended by a massive clay
rampart and a single ditch, and faced W towards the crossing of
the river Esk; the internal buildings, including barracks and
stables, were of stone. Occupation appears to have begun ca.
A.D. 140 and to have continued, with one brief intermission,
until the late 2d c. The planning of the barracks and stables
suggests that an ala quingenaria was in garrison. The bulk of
the extramural settlement lay S and E of the church, probably as
a ribbon development along streets leading to the E gate of the
fort. Air photography has als