In eloquence as an advocate he won a place in the front rank, and earned the reputation of being a sound lawyer and a judicious counsellor. This character was not confined to his native state, for in addition to the friendship of men like the Wentworths and Langdons in New Hampshire, he had secured the esteem and respect of Lowell, Adams, Otis, and other well-known legal lights in Massachusetts. Although attached to his profession, he found time to devote to agriculture and manufactures, being one of the early promoters of the latter, establishing cloth and fulling mills in Durham, and succeeding so well that on the authority of John Adams he was worth ten thousand pounds before the Revolution broke out. From his father and mother he inherited a robust constitution, and was blessed with an active, lively disposition. He had a natural taste for military life, but except an occasional bout with the Indians, generally on the defensive, he had, before the Revolutionary War, no actual experience in warfare; but all around him were the veterans of the Indian and French wars, whose descriptions of the campaigns of Louisburg and Quebec aroused all the martial spirit in his fiery nature.
To his historical studies, especially those relating to military movements, he was greatly devoted; and read them to such good purpose that he was able accurately to describe nearly all of the great battles of the world. It was natural, therefore, for him to seek the exercise of arms early; so at the age of thirty-one he held the commission of major in the Colonial militia, and spared no pains to make himself familiar with the duties connected with the position. From the first rumble of discontent, down to the actual outbreak of hostilities, he was one of the most active men engaged in the cause of liberty. His nature and his abhorrence of oppression, two traits transmitted by generations of heroic ancestors, marked his career from the beginning, and his extended influence and popularity marked him early as a leader in the coming contest. With a full realization of what was before him he organized a company numbering eighty-three men in Durham, and associated with him was the gallant young Scammell, who was then a law student in his office. With a knowledge of these facts it is not too much to say, especially when comparing them with the events occurring afterwards, that the “hidden hand” which directed the movements of the patriots in New Hampshire, down to the convening of the First Provincial Congress in July, 1774, was that of the grandson of the Limerick soldier, who, in little less than a century from the broken treaty, was paying with interest the debt due the government which had driven his father to the wilds of America. He was chosen by the First Provincial Congress to represent his province in the Continental Congress, being the first person to represent New Hampshire in that body. Two instances will be sufficient to show his energy and usefulness in that assemblage. On qualifying, he was at once placed on two of the most important committees, of one of which, that upon the grievances of the people, he was chairman.
“The committee of violation of rights,” says John Adams in his diary, “reported a set of articles which were drawn by John Sullivan, of New Hampshire; and these two declarations, the one of rights and the other of violations, which are printed in the journals of Congress for 1774, were two years afterwards recapitulated in the Declaration of Independence on the 4th of July, 1776.”
“New Hampshire has perhaps not remembered that the bold hand and the legal training of John Sullivan are in the immortal Declaration of Independence.”
On the adjournment of Congress, Sullivan returned to New Hampshire. During his absence the agitation had increased; nearly every town had its committee of safety, and many persons of note, suspected of a leaning towards the government, placed under arrest and kept in confinement, or sent out of the state, unless they took the test oath prescribed by the Assembly. Steps were also taken to prevent the sending of carpenters and other mechanics to Boston to build barracks for the royal troops, as men could not be secured there for that purpose. In one instance a man suspected of procuring workmen for General Gage, was waited on, and the charge being proven, he was obliged to go on his knees, as nothing less would be satisfactory, and make the following confession and promise:
“Before this company I confess I have been aiding and assisting in sending men to Boston to build barracks for the soldiers to live in, at which you have reason to be justly offended, which I am sorry for and humbly ask your forgiveness. And I do affirm that for the future I never will be aiding or assisting in any wise whatever, in act or deed contrary to the constitution of the country, as witness my hand.”
The military stores in Fort William and Mary at Newcastle were a constant source of anxiety to the governor, but he felt confident that no lawless act would be committed by the people without provocation, and as he was cautious in his course, no pretext could be found in that direction, but the inevitable was to happen. A report was circulated that General Gage was to send a body of troops to secure the ammunition.
The arrival of Paul Revere from Boston gave color to the rumor, and on the day following, armed men from the surrounding towns assembled in Portsmouth, and after effecting an organization and choosing their leaders, marched in broad daylight, to the number of four hundred, for Newcastle. On arriving at the fort the commander bade them to enter at their peril. No heed being paid to his words, one volley was fired from the three-pounders in position, but before the guns could be reloaded the walls were scaled and the fort captured at three o’clock P.M. on Dec. 14, 1774. The result was the possession of one hundred barrels of powder, sixty muskets, sixteen cannon, and other valuable stores.
In his letter to General Gage informing him of the event, Governor Wentworth said, “The principal persons in this enormity are well known.”
He mentioned no names, but a little over two years later Peter Livius, who was at the time of the capture, one of the Provincial Councillors, wrote thus to John Sullivan in June, 1777: “You were the first man in active rebellion, and drew with you the province you live in. You will be one of the first sacrifices to the resentment and justice of government; your family will be ruined and you must die with ignominy.”