Voyage to Great Britain
As Davies began his ministry in Virginia, six students began studies in Elizabeth, N.J., at the College of New Jersey, which had been established in 1746 to educate "those of every Religious Denomination." In 1753 the college's trustees persuaded Davies, famed for his work in Virginia, to make the dangerous voyage to Great Britain to raise money for the fledgling school. Davies and Tennent reached London on Christmas Day, December 25, 1753. While in Great Britain he met various prominent religious leaders, including George Whitefield, John and Charles Wesley, along with many prominent political figures. Whitefield was an itinerant preacher and a central figure in the Great Awakening in the American colonies. He invited Davies and Tennent to his home for the duration of their stay. Davies was thoroughly impressed with Whitefield and also recorded his encounter in his diary:
"He spoke in the most encouraging manner as to the success of our mission, and in all his conversation discovered so much zeal and candour, that I could not but admire the man as the wonder of the age! When we returned, Mr Tennent's heart was all on fire; and after we had gone to bed, he suggested that we should watch and pray, and we rose and prayed together till about 3 o'clock in the morning". — Davies
While in England Davies and Tennent made efforts to obtain donations for a new college, founded by Governor Jonathan Belcher at Princeton. This college was to train ministers for the Presbyterian Churches of six colonies. Inspired by their effort, Whitefield wholeheartedly used his influence and connections to help Davies and Tennent in their effort, to which Davies entered an account of the affair in his diary, Wednesday, December 26, 1753, where he commended Whitefield for offering his home to them during their stay in England. Davies was also successful in his appeal in getting the [Religious] Toleration Act extended to Virginia, while also securing the appointment of a new and more sympathetic Governor, to which Whitefield was equally influential in achieving.
While the English Act of Toleration provided a good measure of relief to dissenters in England, contentions were levied in Virginia by the established Anglican authorities over whether such freedoms fully applied in that colony. Davies adamantly disputed the matter, always maintaining a civil and even a congenial tone, and then appealed to Virginia Attorney General Peyton Randolph, who, while defending the application of the Act in its essence, did so while asserting strict legal limits. Other measures were stipulated, including the requirement that dissenters pay taxes to the Anglican Church, regardless if they already made offerings to their own church and pastor. As the colony's Attorney General, he took the position that the act protected dissenting Protestants to worship freely, but maintained that dissenting preachers could not receive multiple licenses to preach across unlimited parishes.
Davies disagreed, arguing that dissenting congregations were so dispersed that their ministers should "have a plurality of places licensed" as a measure of practicality. Peyton, however, maintained that such limitations also applied to Anglican priests, and therefore he could not offer preferential treatment for dissenters, which would, among other things, evoke the ire of Anglican clergy. After much deliberation from the General Court and the Governor's Council in Williamsburg, in April 1747, Davies secured an expanded license for additional meeting houses in 1748, but after further legalities and continued resistance from colonial officials, still had contentions over full applicability of the Act in Virginia. Undeterred, Davies, in 1752, appealed to British Attorney General Sir Dudley Ryder who confirmed the applicability of the Act in Virginia, which became the source of great controversy among colonial officials who made efforts to narrow its interpretation in an effort to stem the rate of dissent, requiring dissenting ministers to swear an oath to the King, and obtain licenses to preach and for places of worship, which required an substantial fee.
Davies confided the sometimes harrowing journey to his diary, writing "To be instrumental of laying a foundation of extensive benefit to mankind, not only in the present but in future generations, is a most animating prospect." Rev. Davies and a fellow Presbyterian minister, Gilbert Tennent spent eleven months in Great Britain, with Davies preaching sixty times. The two raised substantial sums, mainly through church collections. The grandson of Oliver Cromwell gave three guineas to support their efforts. Davies and Tennent eventually raised a total of four thousand pounds on behalf of the College of New Jersey ($237,559 in 2025), enough to build Nassau Hall as the first permanent building on the new campus in Princeton.
After his return from Great Britain, Davies's prominence in Virginia grew during the French and Indian War. Lieutenant Governor Dinwiddie declared Davies to be the colony's best recruiter, as he implored men to do their part "to secure the inestimable blessings of liberty.".
In 1759, four years after Davies returned from his British fundraising tour, the College's trustees called on him again, this time asking him to become the school's fourth president. Davies initially declined their offer, thinking that trustee Samuel Finley was better qualified. Eventually Davies accepted the job, and succeeded Jonathan Edwards, who had died just six weeks after his inauguration. David Cowell, a Princeton trustee who had served as acting president of the college from 1757-1758, conducted the negotiations that led to Davies accepting the position. Davies held Cowell in high regard, saying that he performed his duties with a great deal of "zeal, diligence and alacrity."