His preparations for returning to America were now completed, and early in March, 1785, he embarked in a ship commanded by Captain Dawson, which sailed from London for Halifax. His main object in going by the way of Nova Scotia was to see the situation of that part of his family then resident in that neighborhood. He is recorded as officiating at Annapolis Royal, April, 1785, and was, therefore, the first bishop of our Church who preached in the Dominion of Canada. Mention is also made of his preaching several Sundays in St. John, New Brunswick, where a daughter with her husband was living at the time.

He landed at Newport, Rhode Island, after a voyage of three months, including his stay in Canada, Monday, June 2Oth; and the next Sunday he preached in Trinity Church in that place, the first sermon of an American bishop in the United States, from the text (Hebrews xii. I, 2): "Wherefore seeing we also are compassed about with so great a cloud of witnesses, let us lay aside every weight and the sin which doth so easily beset us, and let us run with patience the race that is set before us, looking unto Jesus the Author and Finisher of our faith."

More than half a century prior to this, a great dignitary of the Church of England, Dean Berkeley, after a voyage of nearly five months from Gravesend, arrived at the same port, and preached many times in the same church, which is still standing. The missions of these men had many points of resemblance; but while one, after a trial of more than two years and a half, failed to accomplish his heroic object, and returned to the land of his birth to be honored with a mitre in the see of Cloyne, the other was blessed in his work, and lived to behold the Church in America united in the adoption of a revised liturgy, and settled upon the old "foundation of the Apostles and Prophets, Jesus Christ Himself being the chief corner-stone."

The next step of Bishop Seabury was to arrange for a meeting with his clergy, and he wrote immediately to the Rev. Mr. Jarvis, who had acted as their secretary, and invited him to New London to consult with him on the time and place. It was held in Middletown on the 2d of August, 1785—a meeting full of joy to both parties— and the clergy, in their address of congratulation and formal recognition, said among other things: "We, in the presence of Almighty God, declare to the world, that we do unanimously accept, receive, and recognize you to be our Bishop, supreme in the government of the Church, and in the administration of all ecclesiastical offices. And we do solemnly engage to render you all that respect, duty, and submission, which we believe do belong and are due to your high office, and which, we understand, were given by the presbyters to their bishop in the primitive Church, while in her native purity she was unconnected with and uncontrolled by any secular power."

The Bishop opened his reply to this address with hearty thanks to the clergy for their kind congratulations on his safe return, and cordially united with them in their joy for the accomplishment of the important business which he had been excited to undertake. His first ordination was held on this occasion, and steps were taken to make such changes in the liturgy as might be necessary to adapt it to the use of the Church in the new civil relations. But what added to the interest and significance of the occasion was the charge which he delivered to the clergy, so valuable both in its teachings and its connection with American Episcopacy. The three points which he enlarged upon in it were the obligations they were under to be very careful of "the doctrines which they preached from the pulpit or inculcated in conversation"; to be cautious about giving recommendations to candidates for Holy Orders, whose moral character, learning, and abilities were not only to be exactly inquired into, but their good temper, prudence, diligence, and everything by which their usefulness in the ministry might be affected. "A clergyman," said he, "who does no good always does hurt; there is no medium." The third point of the charge was upon the necessity of immediate attention to that old and sacred rite handed down by the primitive Church, the laying-on of hands in Confirmation—a rite which, for want of the proper officer to administer it, had hitherto been unused in the American Church.

Seabury had the double work of a bishop and a parish minister, being rector of the church in New London, and meeting its demands with the aid of one of his newly-ordained deacons. His entrance upon the public duties of his Episcopal office in Connecticut had been looked forward to with much curiosity and some prejudice by those outside of the Church. The old Puritan dread of a hierarchy, instilled into the popular mind before the independence of the Colonies, still lingered, and helped to foster the expectation that he would assume great dignity, and appear in a degree of external splendor. There was disappointment in this respect when he began the visitation of his diocese in the simplest and most primitive manner, riding on horseback or in a sulky over rough and circuitous roads, and through regions sparsely inhabited. A plain yeoman, who had never seen a bishop in his robes, and knew not how he would appear in officiating, took an early opportunity to gratify his curiosity and attend a service where he was to preach. The next morning a neighbor, who had not the boldness to follow his example, met him, and asked him what he thought of Bishop Seabury. "Was he proud?" he inquired. "Proud! Bless you, no!" was the reply. "Why, he preached in his shirt-sleeves!"

Beyond the labor of regulating and settling the Church in Connecticut upon right principles, Bishop Seabury was especially anxious that the whole Church in the United States should be so guided as to prevent any division in government, doctrine, and discipline. A Convention was about to be held in Philadelphia to adopt an ecclesiastical constitution and make application for bishops in the English line of succession; and he asked, through Dr. Smith, and renewed the expression of his sentiments in a letter to Dr. (afterwards Bishop) White a few days later, that that body would reconsider certain measures which it had hastily adopted, and which seemed to indicate a forgetfulness that "the government, sacraments, faith, and doctrines of the Church are fixed and settled." Among his words of wisdom and kindness to Dr. Smith were these: "My ground is taken, and I wish not to extend my authority beyond its present limits. But I do most earnestly wish to have our Church in all the States so settled that it may be one Church, united in government, doctrine, and discipline—that there may be no divisions among us—no opposition of interests—no clashing of opinions. And permit me to hope that you will at your approaching Convention so far recede in the points I have mentioned as to make this practicable. Your Convention will be large and very much to be respected. Its determinations will influence many of the American States, and posterity will be materially affected by them. These considerations are so many arguments for calm and cool deliberation. Human passions and prejudices, and, if possible, infirmities, should be laid aside. A wrong step will be attended with dreadful consequences. Patience and prudence must be exercised; and should there be some circumstances that press hard for a remedy, hasty decisions will not mend them. In doubtful cases they will probably have a bad effect."

The action of the Convention in setting forth what is known in American ecclesiastical history as "The Proposed Book" only made him adhere more resolutely to the convictions of his intelligent mind; and his clergy stood by him, and supported him in the sound principles which he maintained. "Depend not on rumors," said one of them, writing to a friend; "the clergy in Connecticut are well pleased with their bishop, and will run the risk of a disunion with the Southern gentry rather than forsake him, if he will stay with us. We hope, however, better things than that." And better things did come to pass. Attempts to cast discredit upon the validity of his consecration, initiated and persisted in mainly by those opposed to him on political grounds, were met in a manly and Christian spirit, and he took the necessary steps to frustrate them without using harsh words or doing more than state simple facts. His second and last formal Charge to his clergy, delivered September, 1786, whether considered in reference to the unbelief of the times, or to the movement of the clergy and laity in the Southern States to revise and alter the liturgy and government of the Church, is a production of remarkable forecast and wisdom. At this time he set forth a Communion-office, agreeably to the terms of the Concordate made with the Scottish bishops, which gradually went into use in the diocese, and traces of this particular office lingered in Connecticut for half a century. When the union of the Church in all the States was consummated in 1789, and the first real General Convention held in that year, consisting of a House of Bishops and a House of Clerical and Lay Deputies, entered upon a review of the Book of Common Prayer, the proposition to insert the Scottish form of consecration was accepted and approved, the words only "That they may become the Body and Blood of Thy most dearly beloved Son," being omitted, and those in the English office substituted.

There were now three bishops in the American Church, and efforts were made to bring them together in the consecration of a fourth, but without avail. Bishops White and Provoost considered themselves under an implied obligation not to join in any consecration until there should be the actual number of three in the English line of succession. Provoost was absent from the Convention of 1789, when the Prayer-Book was revised, and Seabury, being the senior, was made the President of the Upper House. He and Bishop White spent no time in speeches, but looked carefully at each point as it came into view. With minds and characters differently constituted and moulded, they were just the men to be brought together in such an emergency. One was frank and fearless in adhering to his settled convictions, and resolute in upholding the faith and preserving the ancient landmarks of the Church, but not so self-willed and tenacious of his opinions that he could not gracefully relinquish them where no essential principle was involved. The other had a less rigid temperament, and from natural kindness of heart, and perhaps personal inclination, he might have been led without this check to yield to the pressure of circumstances at the expense of a true conservatism. Bishop White, however, was not more gentle and generous than capable of appreciating the character of his Episcopal brother; and the testimony which he bore long years after was that he "had ever retained a pleasing recollection of the interviews of that period, and of the good sense and Christian temper of the person with whom he was associated."

In 1792 another General Convention was held, and Bishop Seabury preached the sermon, which was printed by the request of both Houses, and glowed with the true spirit of Christian love, with that perfect and comprehensive charity which tends to preserve the peace and unity of the Church under all possible circumstances.