on and evening.
These are followed by General Johnston, with Bee's Brigade--comprising
the 4th Alabama, 2d Mississippi, and a battalion of the 11th
Mississippi--which arrive at Manassas about noon of Saturday, the 20th
of July, the balance of Johnston's Infantry being billed for arrival
that same day, or night.

Upon Johnston's own arrival at Manassas, Saturday noon,--the very day
that Patterson ascertains that "the bird has flown,"--after assuming
command, by virtue of seniority, he proceeds to examine Beauregard's
position. This he finds "too extensive, and the ground too densely
wooded and intricate," to be learned quickly, and hence he is impelled
to rely largely upon Beauregard for information touching the strength
and positions of both the Rebel and Union Armies.

Beauregard has now 21,833 men, and 29 pieces of artillery of his own
"Army of the Potomac." Johnston's and Holmes's junction with him has
raised the Rebel total to 32,000 effectives, and 55 guns. McDowell, on
the other hand, who started with 30,000 effectives, finds himself on the
19th--owing to the departure of one of his regiments and a battery of
Artillery, because of the expiration of their term of enlistment,--with
but "28,000 men at the utmost."--[Comte de Paris.]

On the evening of Saturday, the 20th of July, Johnston and Beauregard
hold an important consultation. The former feels certain that
Patterson, with his more than 20,000 effectives, will now lose no time
in essaying a junction with McDowell's Army, and that such junction will
probably be effected by July 22nd. Hence he perceives the necessity of
attacking McDowell, and if possible, with the combined Rebel Forces,
whipping him before Patterson can come up to his assistance.

At this consultation it is agreed by the two Rebel generals to assume
the offensive, at once. Beauregard proposes a plan of battle--which is
an immediate general advance of the Rebel centre and left,
concentrating, from all the fords of Bull Run, upon Centreville, while
the Rebel right advances toward Sangster's cross-roads, ready to fall
either on Centreville, or upon Fairfax Court House, in its rear,
according to circumstances.

The plan proposed, is accepted at once by Johnston. The necessary order
is drawn up by Beauregard that night; and at half past four o'clock on
Sunday morning, July 21st, Johnston signs the written order. Nothing
now remains, apparently, but the delivery of the order to the Rebel