Mayor Brown assured the President that the city authorities would use all lawful means to prevent their citizens from leaving Baltimore to attack the troops in passing at a distance; but he urged, at the same time, the impossibility of their being able to promise anything more than their best efforts in that direction. The excitement was great, he told the President, the people of all classes were fully aroused, and it was impossible for any one to answer for the consequences of the presence of Northern troops anywhere within our borders. He reminded the President also that the jurisdiction of the city authorities was confined to their own population, and that he could give no promises for the people elsewhere, because he would be unable to keep them if given. The President frankly acknowledged this difficulty, and said that the Government would only ask the city authorities to use their best efforts with respect to those under their jurisdiction.

The interview terminated with the distinct assurance on the part of the President that no more troops would be sent through Baltimore, unless obstructed in their transit in other directions, and with the understanding that the city authorities should do their best to restrain their own people.

The Mayor and his companions availed themselves of the President's full discussion of the day to urge upon him respectfully, but in the most earnest manner, a course of policy which would give peace to the country, and especially the withdrawal of all orders contemplating the passage of troops through any part of Maryland.

On returning to the cars, and when just about to leave, about 2 P. M., the Mayor received a dispatch from Mr. Garrett (the President of the Baltimore and Ohio Railroad) announcing the approach of troops to Cockeysville [about fourteen miles from Baltimore on the Northern Central Railroad], and the excitement consequent upon it in the city. Mr. Brown and his companions returned at once to the President and asked an immediate audience, which was promptly given. The Mayor exhibited Mr. Garrett's dispatch, which gave the President great surprise. He immediately summoned the Secretary of War and General Scott, who soon appeared with other members of the Cabinet. The dispatch was submitted. The President at once, in the most decided way, urged the recall of the troops, saying he had no idea they would be there. Lest there should be the slightest suspicion of bad faith on his part in summoning the Mayor to Washington and allowing troops to march on the city during his absence, he desired that the troops should, if it were practicable, be sent back at once to York or Harrisburg. General Scott adopted the President's views warmly, and an order was accordingly prepared by the Lieutenant-General to that effect, and forwarded by Major Belger, of the Army, who also accompanied the Mayor to this city. The troops at Cockeysville, the Mayor was assured, were not brought there for transit through the city, but were intended to be marched to the Relay House on the Baltimore and Ohio Railroad. They will proceed to Harrisburg, from there to Philadelphia, and thence by the Chesapeake and Delaware Canal or by Perryville, as Major-General Patterson may direct.

This statement is made by the authority of the Mayor and Messrs. George W. Dobbin, John C. Brune and S. T. Wallis, who accompanied Mr. Brown, and who concurred with him in all particulars in the course adopted by him in the two interviews with Mr. Lincoln.

Geo. Wm. Brown, Mayor.

This statement was written by Mr. Wallis, at the request of his associates, on the train, and was given to the public immediately on their return to the city.

In the course of the first conversation Mr. Simon Cameron called my attention to the fact that an iron bridge on the Northern Central Railway, which, he remarked, belonged to the city of Baltimore, had been disabled by a skilled person so as to inflict little injury on the bridge, and he desired to know by what authority this had been done. Up to this time nothing had been said about the disabling of the bridges. In reply I addressed myself to the President, and said, with much earnestness, that the disabling of this bridge, and of the other bridges, had been done by authority, as the reader has already been told, and that it was a measure of protection on a sudden emergency, designed to prevent bloodshed in the city of Baltimore, and not an act of hostility towards the General Government; that the people of Maryland had always been deeply attached to the Union, which had been shown on all occasions, but that they, including the citizens of Baltimore, regarded the proclamation calling for 75,000 troops as an act of war on the South, and a violation of its constitutional rights, and that it was not surprising that a high-spirited people, holding such opinions, should resent the passage of Northern troops through their city for such a purpose.

Mr. Lincoln was greatly moved, and, springing up from his chair, walked backward and forward through the apartment. He said, with great feeling, "Mr. Brown, I am not a learned man! I am not a learned man!" that his proclamation had not been correctly understood; that he had no intention of bringing on war, but that his purpose was to defend the capital, which was in danger of being bombarded from the heights across the Potomac.

I am giving here only a part of a frank and full conversation, in which others present participated.