I have to admit I somehow overlooked Admiral Henry when compiling my 'TARS' database. I have already visited Rolvenden and recorded the grave of two naval officers from the Weller family. It now looks like I will have to re-visit Rolvenden and hopefully find Henry's grave. As it transpires Henry was related, by marriage, to the Weller's.
I have found nothing that directly links Henry with Beatty, although it occurs to me that Beatty and Henry may have met professionally. From the few snippets I have seen, it appears Henry, had his own unique remedies for Rheumatism and gout among other afflictions, some of which may have been of interest to the medical profession. Perhaps Henry's story was of particular interest to Beatty?
I did find a newspaper cutting that gives the name of Admiral Henry's house at Rolvenden:
express & Ashford (???) newspaper cutting
After his resignation of the vicarage of Tenterden, the Rev. J.R. Coombe lived for many years at Sparkeswood, a house he had inherited through his wife on the death of Admiral John Henry, R.N., an old resident in the parish since 1760. Admiral Henry was allied by marriage to the very old Rolvenden family, of Weller, of Kingsgate. Mrs. Baker had been laid aside by illness for a considerable number of years, but there are many who will remember her unfailing acts of kindness in cases of need. The interment took place on Tuesday, in the family grave at Brighton, the service being taken by the Rev. H. Percival Smith, M.A., of High Halden, a former vicar of Rolvenden. In addition to the tokens from the family very beautiful wreaths were received from the Rolvenden Parish Council, Rolvenden V.A.D. detachment and the household and garden staff.There is still a Sparkeswood House at Rolvenden, whether it is the same one I couldn't say-I have not seen the building.
I also found a brief biography for Admiral Henry, taken from the following book which was published shortly before his death:
" An Account of the means by which Admiral Henry, of Rolvenden, in Kent, has cured the Rheumatism, a Tendency to Gout, the Tic Douloureux, the Cramp, and other Disorders; and by which a Cataract in the Eye was removed."
Admiral Henry was born at Holyhead, in the island of Anglesea, on the 28th of Sept. 1731, and consequently was, on the 28th of Sept. last, turned of 91 . He went into the navy in the year 1744. Whilst on service, he had his thigh bone completely broken by a hawser, in 1746. He was at the capture of the Havannah in 1762, first lieutenant of the Hampton Court. During the American war, he was made, in 1779, a captain, by that distinguished admiral, Lord Howe, in consequence of his success in taking Mud Island in the Delaware, which was considered at the time a most important service. He was made an admiral in 1794, is now an admiral of the
red, and the twelfth on the list. He was married; had no family, and is now a widower. Soon after the close of the American
war, in 1786, Admiral Henry returned to the parish of Rolvenden in Kent, where he had formerly resided, and where, during his absence, a house had been built for him, in the neighbourhood of a pleasant village, about 55 miles from London, 21 from Maidstone, and three from Tenterden. He has resided there ever since, with the exception of about a year and a quarter, during which period he was on service with the late Earl St. Vincent, and assisted in capturing the French Islands in 1793 and 1794.
If anyone is more interested in Admiral Henry's remedies:
http://www.ebooksread.com/authors-eng/thomas-john-graham/an-account-of-persons-remarkable-for-their-health-and-longevity--exhibiting-the-ala/page-12-an-account-of-persons-remarkable-for-their-health-and-longevity--exhibiting-the-ala.shtml