Captain Hartroy held an independent command. His force consisted of a
company of infantry, a squadron of cavalry, and a section of artillery,
detached from the army to which they belonged, to defend an important
defile in the Cumberland Mountains in Tennessee. It was a field
officer's command held by a line officer promoted from the ranks, where
he had quietly served until "discovered." His post was one of
exceptional peril; its defense entailed a heavy responsibility and he
had wisely been given corresponding discretionary powers, all the more
necessary because of his distance from the main army, the precarious
nature of his communications and the lawless character of the enemy's
irregular troops infesting that region. He had strongly fortified his
little camp, which embraced a village of a half-dozen dwellings and a
country store, and had collected a considerable quantity of supplies. To
a few resident civilians of known loyalty, with whom it was desirable to
trade, and of whose services in various ways he sometimes availed
himself, he had given written passes admitting them within his lines. It
is easy to understand that an abuse of this privilege in the interest of
the enemy might entail serious consequences. Captain Hartroy had made an
order to the effect that any one so abusing it would be summarily shot.
While the sentinel had been examining the civilian's pass the captain
had eyed the latter narrowly. He thought his appearance familiar and had
at first no doubt of having given him the pass which had satisfied the
sentinel. It was not until the man had got out of sight and hearing that
his identity was disclosed by a revealing light from memory. With
soldierly promptness of decision the officer had acted on the
revelation.