Below, the proof of the Calvinism of William Livingston:
"New York, Sept. 18, 1755.
It was then again asked by Mr. William Livingston in order to prevent disputes whether we all understood each other and whether it was not a unanimous vote for Mr. B to which all answered they understood it as a unanimous vote...In consequence of this choice application was made to the Rev. Mr. B, on the 20th of August at his church at Jamaica before a presbytery then there held by Mr. Livingston, the New York churches delegate for the removal of the said Mr. B, from his said congregation at Jamaica to that of New York in virtue of their call to him."
--AN EARLY DOCUMENT CONCERNING THE FIRST PRESBYTERIAN CONGREGATION OF NEW YORK
Vol. 1, No. 3 (MARCH A. D. 1902), pp. 238-9.
Amazing! Livingston was one of the highest Calvinist leaders in New York and not just a messager boy, rather he was a man of power and influence. Livingston was a high ranking Presbyterian in 1755, just three years after writing in the Independent Reflector publication. Here is where Livingston puts his name to the Reformed faith:
"[W]e declare freely against..making the Westminster Confession a test of admission into the church, at least to private members, which some of our [Scotch] brethren have constantly been driving at. From this they were carried away with an ungrounded jealousy and opinion that we did not befriend the established doctrines and discipline of the church; which is so far from being true with regard to us, that we beg leave to assure you, we have no objection to the Westminster Confession, Shorter and Longer Catechisms and acknowledge the same to contain a true and perfect scripture doctrine of salvation..."
--p.244. Out of over 100 names listed, Livingston is sixth on the list.
It wasn't just Livingston who was against creeds. Many Calvinists were against them because they were man made and could interfere with God's revelation.
Here is another group of Presbyterians combating the Anglican establishment in 1769 and Livingston is on the list. On p. 501-502, he was nominated Moderator for their next meeting, which included selected Baptists. P. 503 says Livingston is a member of the Presbyterian church.
The Society of Dissenters founded at New York in 1769
The American Historical Review
Vol. 6, No. 3 (Apr., 1901), pp. 499-500.
On p. 241 of another periodical, Livingston is more Calvinist than "most of those who were his social equals." Page 242 has Livingston and his friends toasting to "the immortal memories of Oliver Cromwell and John Hampden." How awesome was Cromwell and that happened before his independent reflector publication. Later, it says the most important man in New Jersey from 1776 to 1790 was Livingston and a Calvinist at that.