We are also interested in a Henry Charles Dron and have just come upon your message. It seems likely that they are the same people -

My mothers' grandfather was Henry Charles Dron (1861 - 1945) and we kow that he had 3 sisters, Louisa, Mary and Emma. He married Flora Helps (1877 - 1941) and their daughter Florence Lilian was my grandmother.

We know very little about this strand of the family and would be really interested to find out some more. Anything to further our search would be gratefully received!