Letter from J A [Joseph Alfred] Hardcastle, Royal Astronomical Society, Burlington House, London, to 'Dear Uncle Willie' [Sir William James Herschel] He took courage in both hands to tell Dr Dreyer to go to Slough on Monday - he is only in England for two days. He tells Sir William in case he could go there too, but if not write a note which would find him there. Dreyer is delighted with the journal. no date [1911?]