Great grandfather Nils Rasmussen

I am looking for the death date of my great grandfather, Nils Rasmussen. He is listed in the 1865 census as living with his daughter, Andrea Nikkoline Nilsdatter and son, Knud Nilssen and his wife, Anne Martilde Halvorsdatter. After that date I have lost Nils Rasmussen, could anyone let me know if they know the date of his death. Ragnhild Moyer