Governor Morgan appointed General Arthur state inspector-general in February, 1862, and ordered him to visit and inspect the New York troops in the army of the Potomac.  While there, as an advance on Richmond was daily expected, he volunteered for duty on the staff of his friend, Major-General Hunt, commander of the Reserve Artillery.  He had previously, when four fine volunteer regiments had been organized under the auspices of the metropolitan police commissioners of of the city of New York, and consolidated into what was known as the “Metropolitan Brigade,” been offered the command of it by the colonels of the regiments, but on making formal application, based on a desire to see active service in the field, Governor Morgan was unwilling that he should accept, stating that he could not be spared from the service of the State, and that while he appreciated General Arthur’s desire for war-service, he knew that he would render the country more efficient aid for the Union cause by remaining at his State post of duty.

When, in June, 1862, the situation had an unfavorable appearance, and there were apprehensions that a general draft would be necessary, Governor Morgan telegraphed General Arthur, then with the Army of the Potomac, to return to New York.  The General did so, and was requested, on his arrival, to act as secretary at a confidential meeting of the governors of loyal States, held at the Astor House, on the twenty-eighth of July, 1862.  After a full and frank discussion of the condition of affairs in their respective States, the governors united in a request to the President to call for more troops.  President Lincoln, on the first of July, issued a proclamation, thanking the governors for their patriotism, and calling for three hundred thousand three-years volunteers, and three hundred thousand nine-months militia-men.  Private intimation that such a call was to be issued would have enabled army contractors to have made millions; but the secret was honorably kept by all until after the issue of the proclamation.  The quota of New York was 59,705 volunteers, or sixty regiments, and it was desirable that they should be recruited and sent to the front without delay.  General Arthur, by special request of Governor Morgan, resumed his duties as quartermaster-general and established a system of recruiting and officering the new levies, which proved wonderfully successful.  In his annual report, made to the governor on the twenty-seventh of January, 1863, he said:—­

“In summing up the operations of the department during the last levy of troops, I need only state as the result the fact that through the single office and clothing department of this department in the city of New York, from August 1 to December 1, the space of four months, there were completely clothed, uniformed, and equipped, supplied with camp and garrison equipage, and transported from this State to the seat of war, sixty-eight regiments of infantry, two battalions of cavalry, and four battalions and ten batteries of artillery.”