Coleridge does not list a date of writing at the beginning of the letter. However, based on a reference to the following day being July 27, it was most likely written on July 26, 1833. See the published edition of the correspondence, cited below, for additional information.
No place of writing is given, but based on references in the letter and biographical information, it was most probably written in Ramsgate, where Coleridge and the Gillmans were staying at 4 Belle Vue Place.
This collection, MA 1856, is comprised of 48 letters from Samuel Taylor Coleridge to Joseph Henry Green and 2 autograph manuscripts, written between 1817 and 1834. See the collection-level record for more information (MA 1856.1-50).
This letter is from the Joanna Langlais Collection, a large collection of letters written by Samuel Taylor Coleridge to various recipients. The collection has been divided into subsets, based primarily on Coleridge's addressees, and these sub-collections have been cataloged as MA 1848-1857.
Address panel: "J.H. Green, Esqre / &c &c / 46. Lincoln's Inn Fields."
Apologizing for not having written; saying that he went to Ramsgate with the intention of reviewing the chapters they had written together in preparation for beginning work on a third section "on the IDEAS, or the resolution of the Sense, the Understanding into the Reason, in the evolution of which I joyfully know that you have had at least an equal co-productiveness with myself"; explaining that because of a number of issues concerning the Gillmans, including James Gillman's health, and his own busy daily schedule of baths and receiving visitors (among them Sophia Lockhart, Sir Walter Scott's daughter, and Thomas Wentworth Beaumont, M.P. for Northumberland), he has not had time to work; saying that he has instead read through "the four folios of [Joseph] Bingham's Antiquities of the Christian Church," had a "great treat in a thorough enjoyment & examination of Canterbury Theatre" (possibly a reference to the cathedral) and visited Southey's brother, Captain Thomas Southey, with his large family; adding "& the feelings I have left behind with them may perhaps be a means with God's influence, of making the SOUTHEY feel his unkind neglect of me -- & God knows! it is wholly & exclusively from my persistent regard for him & his better Being, that I desire it"; saying that, in short, all he has done since he left them is improved his health and appearance; describing the "warm salt Shower Baths" that he says have been particularly beneficial; telling an anecdote: "As I was crawling up the Hill towards Belle Vue, where we lodge, a stately old Lady, certainly not less than 80, was coming down -- I was making way to give her the Wall -- when with an unexpected alacrity of motion she made the outward Curve, & with grave solemnity said -- No, Sir! You are the far Elder. It is my Duty to make way for the Aged"; mentioning that James Gillman's anxieties are beginning to counteract the effect of sea-air and ocean baths and they plan to "return tomorrow (Saturday, 27 July) by the Steamer," which may mean that he will see them on Sunday; sending his "affectionate Love" to Anne Green.