Several of his letters are preserved in the British Museum. In one of these, addressed to Sheldon, afterwards Bishop of London, so early as October the 14th, 1649, he remarks, respecting his friend: "I think, when I saw Dr. S[anderson] last, certainly he told me he used the Common Prayer, otherwise I wonder not that he that disuses it, should think fit to go to their churches that do omit it. When you meet with him, endeavour to infuse some courage into him, the want of which may betray his reason. His opinion expressed will betray many."[345] The method pursued by Sanderson, of using the Liturgy with verbal alterations, so as to give the appearance of not adopting it, when he employed it in substance, displeased and perplexed some of his episcopal acquaintance; but beyond this--as it appears from another letter by Hammond--his companion once thought of becoming associated in public religious ministrations "with the Grantham Lecturers." To do such a thing, Hammond, altogether a stiffer Churchman than Sanderson, regarded as illegal--as not allowed by the authority of the Bishop, who was still alive, and might be consulted--as countenancing schismatics, and therefore an act of schism--and as not right, even if the end were good. The rest of the letter is so indicative of the temper of the best High Churchmen in those days, that it deserves to be quoted at length. "I cannot believe that the end, by your letter mentioned, is good for to sweeten them by complying with them in schismatical acts; and making them believe themselves pardonable, whilst they continue and remain unreformed in their schism, is to confirm them in their course and so to scandalize them as well as others, to put a stumbling-block in their way to reformation. Certainly the greater charity to those moderate reformable Presbyters were to assist, and hasten the perfecting of their repentance, and renouncing of their erroneous practices, and then if the Bishop give leave to Dr. Sa[nderson] to erect some other lecture, they will sure come and combine with him. And for those that mean not this, 'tis certain that they are not to be persuaded, that if the laws regain their power, they shall be tolerated (their way being so unreconcilable with Prelacy), and as certain that instead of serving Dr. Sanderson's end they desire to serve themselves of him, and by his presence and joining with them, to have him thought such as they--and so hath Mr. Baxter already divided the Prelatical Clergy into two parts, one exemplified by Dr. Ussher and Dr. Sanderson; the other styled, in gross, Cassandrian, Grotian Papists; and several of his friends marked out by some circumstances to be of that number. Lastly, he may do well to consider whether, if from writing for the Engagement first and then the laying aside the Liturgy, he proceed farther to this, it will not be after more easy to superstruct on these beginnings more suitable practices than it hath been to reconcile these