| Description | Congratulates Ross on being put on special duty to investiage malaria, adding that it will be advantageous to go on to kala-azar as L Rogers work on the parasite is very dubious. He reminds Ross of 'MacCallum's discovery of the flagellum impregnation of halteridium spheres', asks Ross to send him some mosquitoes infected with filaria if he has time and advises him to work on birds. |