Letter, from Henry Holland to Sir John Herschel, dated at Brook St. Autograph letter signed by sender. Delayed answering John Frederick William Herschel's letter until Henry Holland could find details of works by 'Göttingen Professor,' but has had difficulty in locating them. Any treatise connecting epidemics with fungous origins would be of interest. Will bring distressing medical case to attention of one of Henry Holland's committees. Henry Holland's Medical Notes and Reflections, 3rd edition (1855). 7 January 1850