Letter from Mary Cornwallis Herschel, to [John Herschel] She has sent Hennessey's letter back up the hill and lists family and other correspondence she has received, including a letter from John. She gives an account of her health, injecting morphia with Esther's help after a gap of thirty-seven hours. Dr. Cockerill told amusing stories about the introduction of the subcutaneous injection in his hospital. One patient considered it 'as good as a tot of gin & got himself an instrument & bottleful when he went out'. 2 [December 1871]