I have read the following story many times:
John Wesley was riding along a road one day when it dawned on him that three whole days had passed in which he had suffered no persecution. Not a brick or an egg had been thrown at him for three days. Alarmed, he stopped his horse, and exclaimed, “Can it be that I have sinned, and am backslidden?” Slipping from his horse, Wesley went down on his knees and began interceding with God to show him where, if any, there had been a fault. A rough fellow, on the other side of the hedge, hearing the prayer, looked across and recognized the preacher. “I’ll fix that Methodist preacher,” he said, picking up a brick and tossing it over at him. It missed its mark, and fell harmlessly beside John. Whereupon Wesley leaped to his feet joyfully exclaiming, “Thank God, it’s all right. I still have His presence.”
This can be found on many websites with identical wording. Unfortunately, almost none of them mention any source for this story. http://truelightministries.org/blog1/archives/83 at least mentions "J. G. Morrison" as the author, but isn't any more specific.
And http://zoeperissos.blogspot.de/2013/03/an-uncomfortable-peace.html mentions that the story does not seem to appear in Wesley's journal.
Is there any credible source for this story, or is this just a later invention?