All I know is that Kate's niece was named Lillian Rafferty and she is who Kate is supposed to have written the letter to. Here are some archived posts on the letter.
Bob - Was Kate related to the Rafferty family in Tombstone? Capt. John P Rafferty was politically active in Tombstone in the early 1880s. His daughter Nellie dressed up as "Goddess of Liberty" to ce... more
I have Kate’s niece as Lillian May Lane Rafert ( 1879-1940) . Lillian’s mother was Kate’s sister, Rosalia. Her father, Ephriam Lane, died in 1879,same year Lillian was born . Rosalia married two more ... more
Robert, I think I found where "Rafferty" got put into the mix:
https://nediscapp.herokuapp.com/discussion.cgi?disc=39627&article=21110&page=0
Gary Roberts cites "Raffert" with two f's in his Do... more
If there is any truth to the story of her, Kate, observing the shoot-out from Fly's boarding house window, depending on her shaky relationship with Holliday...why would not the Defense want her for a ... more