Hi James,
I was never really specifically researching the 13th. I have spent over 12 years researching the 11th and hope to have a regimental history coming out soon. The 11th was in the same brigade as the 13th so that's why I know quite a bit about them. I have access to their service records if I could help you with that or if you have general questions I might be able to answer. I have also reprinted Vaughan's history on the 13th with an added chapter that I wrote and pictures that might be of interest if you haven't already seen that. Let me know how I can help.