Delighted to hear from you Holly! I have recently made contact with descendents of Horace Sheldon Cornell, one of the elder brothers of your Great Grandfather Percy Cornell: they were both first cousins of my father Sidney (1890-1956).
You are welcome to contact me on my home email firstname.lastname@example.org
and I will invite you to my Cornell Family Tree.
Looking forward to more contact Best wishes Janice (1949) in rural Suffolk England