Letter from William James Herschel, on board the Hunsdon, Hooghly, to 'Dearest Mother' [Margaret Brodie Herschel] William has been kept in a state of stupefaction by ganja, or hemp. His family have gone to Kishnagar, to avoid the risks of dengue fever. Rosey McNeile now has a mild attack. Every other person in Calcutta [Kolkata] seems to have had it. William has received kind letters from [Vernon Hugh] Schalch and others, and [George] Campbell himself came to see William. He is grieved not to be able to spend some leave at Bangalore with his brother and sister. In a postscript, he writes that he has almost shaken off the fever 1 May 1872