Letter, from Sir John Herschel to Richard Sheepshanks, dated at Collingwood Autograph letter signed by sender. Clarifies his position with regard to becoming the Royal Astronomical Society Foreign Secretary. Sets conditions under which he would allow his name to stand. Has been 'harassed' for the last two months by 'stomach derangements.' 'It is old Paracelsus's Archaeus" in a fit of the Sulks.' On the disposal of some of Francis Baily's remaining manuscripts." 19 January 1846