There is a compilation of clinical cases titled "Microdoses Megaresults" by a renowned Indian homeopathy doctor Diwan Harish Chand. It lists around 400 cases with complete histories of patients each spanning many years.

It is a wonderful compilation in the sense that it first lists all complaints and test results of a patient and then follow up results after treatment by remedies. He has discussed why he selected a particular remedy and why it worked or not worked.

This book serves as a good empirical evidence for me.