? Eccleshall, Hosp-Sgt John, (769), 17th L (p251) Enl c. 1843. At Sea, Constant., & Devna 1stto 3rd Mstrs respectively [54-2-2]. Free Rations as Hosp Sgt [55-3-2] & [56-1-2]. W/ Svc Trps entire period [54-1 to 56-1] as a Hosp Sgt. Inv 10-29-59.Medal [490/496] w/ A [490/496], B , I, [490/496] & S  Clasps. **(new entry) ‘Eccleshall enlisted 12.12.43 in Birmingham, and was a clerk prior to enlistment; he stood 5’ 7 1/2” tall and weighed 11 st; in 1851 he was single and 25 1/2 years of age.’ [RS].
To translate for you: John Eccleshall, regimental number 769, served as a Hospital Sergeant throughout the Crimean War; he was with the service troops (those at the seat of the war) throughout the entire war period and was awarded a Crimean Medal with clasps for Alma, Balaklava, Inkerman, and Sebastopol (at the page numbers in brackets as listed on the Medal Rolls; He was invalided (discharged as an invalid) on 29 Oct 1859 and left the service. I found no more about him in my researches. The new entry was information from Robin Smith of South Africa and is self explanatory; it probably came from a form 20 or 24 in the paylists or muster rolls at some point during his service. The reference to page 251 indicates the page where he is mentioned in Lummis' "Honour the Light Brigade"; the only information you will find there which was not included in my book is that his enlistment date was c. November 1843, and that his medal with 4 clasps was sold at Sotheby's in Feb 1879, and thrice at Glendinings: Mar 1912; Jun 1917; and Jun 1921. He is inexplicably absent from Dutton's "Forgotten Heroes: The Charge of the Light Brigade" (2008, the only other published source listing the men of the Light Brigade.
The only persons who I know of that may have more information are Philip Boys and Roy Mills at 'The Lives of the Light Brigade' website; if they are not too busy, I am sure they would answer a query.