If however, you think the force here stated too small to hold the territory regarded as necessary to hold possession of, I would say concentrate at least twenty-five thousand men of your present command for operations against Mobile.

With these and such additions as I can give you from elsewhere, lose no time in making a demonstration, to be followed by an attack upon Mobile.

Two or more iron-clads will be ordered to report to Admiral Farragut.

This gives him a strong naval fleet with which to co-operate.

You can make your own arrangements with the admiral for his co-operation, and select your own line of approach.
My own idea of the matter is that Pascagoula should be your base; but, from your long service in the Gulf Department, you will know best about the matter.