Wesley's Role as Preacher

In reading Wesley's journal around his Aldersgate experience, I was especially struck by how often he mentioned preaching somewhere that he was "to preach no more" (56, 58, 59, 68). What was it about his preaching experiences that meant he was not to return? Who was he preaching to, and was the decision to end the relationship more his decision or theirs? If the culture of preaching was to travel to different churches and relationships were inherently shorter, why did Wesley make such a point to mention the end of each preaching experience? Do we have access to any writings from the members of these churches where Wesley felt he was to preach no more?