William Murray (1705-93)
William Murray was a contemporary of Charles Wesley at Westminster School and the two remained friends to the end of Wesley's life. In addition to holding office as Lord Chief Justice, Murray served as Chancellor of the Exchequer and speaker of the House of Lords. He was created Earl of Mansfield in 1776.
In 1784 Charles Wesley consulted Murray concerning the legal situation with regard to ordination of Methodist preachers.
Source: Dictionary of National Biography and Methodist historical sources