Copy letter, from Sir John Herschel to William Henry Smyth, dated at [Collingwood] Copy of a letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Agrees to support C. P. Smyth for membership in Royal Society [of London] Objects to C. P. Smyth's statement regarding his discoveries observing at high altitudes. Stresses importance of variable star work. 29 January 1857