of the Alleghanies, while its Eastern branch, taking a general
South-easterly direction, crosses the Richmond and Fredricksburg
railroad at Hanover Junction, some twenty miles North of Richmond,
and thence sweeps Southerly to the Rebel capital.

It is along this Easterly branch of the Virginia Central that Rebel
re-enforcements will be hurried to Beauregard, from Richmond to
Gordonsville, and thence, by the Orange and Alexandria railroad, to
Manassas Junction.

Some twenty-five miles from Alexandria, a short railroad-feeder--which
runs from Strasburg, in the Shenandoah Valley, through the Blue Ridge,
at Manassas Gap, in an East-South-easterly direction--strikes the
Alexandria and Orange railroad. The point of contact is Manassas
Junction; and it is along this Manassas-Gap feeder that Johnston, with
his Army at Winchester--some twenty miles North-North-East of Strasburg
--expects, in case of attack by Patterson, to be re-enforced by
Beauregard; or, in case the latter is assailed, to go to his assistance,
after shaking off Patterson.

This little link of railroad, known as the Manassas Gap railroad, is
therefore an important factor in the game of War, now commencing in
earnest; and it had, as we shall see, very much to do, not only with the
advance of McDowell's Union Army upon Bull Run, but also with the result
of the first pitched battle thereabout fought.

From Alexandria, some twelve miles to the Westward, runs a fine turnpike
road to Fairfax Court-House; thence, continuing Westward, but gradually
and slightly dipping award the South, it passes through Germantown,
Centreville, and Groveton, to Warrenton.