The John H. Glossop you are talking about is my great-grandfather. His son last living son, Clinton, is my grandfather. I have some contact with other Glossops who are doing research, or have done research on the Glossop family. I will share with you anything that I have.
Clinton came to California around 1920/1921. He was married twice: once to Ada Johnson and had two daughters, Loretta and Mildred. Then again in 1923 to Grace Carroll Brock, a widow with two children. They had six children: John H., Clinton B,. Veola Mae (my mom), Carroll Edward, Gerald Nelson, and Florine Ruth.
We are having a small Glossop get together on August 19th, in Ashland, Oregon.
Let me know if I can help you in your search.