Sorry, I did not see your post before. I have the book Revolutionary days, written by Princess Julia Cantacuzene,Countess Speransky, nee Grant. It is a very good book, she relates her ordeals in leaving Russia with her husband. Her husband was Prince Michael Cantacuzene, Count Speransky, AD to Grand Duke Nicholas Nicholavich. Her other book My life here and there, is also very good, and relates her life before she married the prince.
Amelia