Hi Pam. Thanks for letting me now that you were able to read the history of Sunlaws.
Do please use the history detail. Sorry it doesn't help regarding the servants or their lives. I don't know how one goes about finding this out. The only thing of any relevance is perhaps who was actually living in Sunlaws at a particular time. From the history you will see that when the house was rebuilt in 1888/90, the family in residence at the time of the fire in 1885 then consisted of William Scott-Kerr, his daughter Mary by his first wife, Lady Scott Douglas of Springwood and nine children by his second wife Frances Louisa Fennessy, who died in 1884.
All the best with your enquiries. Let me know if you find anything out,
best wishes, Robert