Letter from Henry Smith to Richard Butcher Manuscript letter from Henry Smith to Richard Butcher asking for a copy of Butcher's paper on excision of the knee joint to send to a friend in Frankfurt. Smith is unwilling to send his own copy as he finds 'it such a valuable reference'. Smith then reports that how frequently the operation is now used in London, with 'to my knowledge between 60 and 70 cases done, and the deaths averaging about 1 in 7'. Smith then discusses a couple of cases in more detail. 8 June [1856]