Mr. Pickering's letter to Mr. Whitefield : touching his relation to the Church of England; his impulses or impressions; and the present unhappy state of things, &c. Offered in excuse of Mr. Pickering's disinclination to open his pulpit to him in his late visit to Ipswich, &c. : Together with Mr. Pickering's letter to a neighbouring minister; exhibiting his opinion with respect to the reception of Mr. Whitefield, upon private satisfaction.