Hello
Glad somebody has mentioned Salisbury.
This Cecil family had extensive links with other families. Sometimes an Estate will be owned by the same family for 100s of years, but you will also find property acquisitions and Marriage Settlements relating to property.
For example, it could be a house of a family, that the Cecils have married into, or visited?
I also noticed Cecil and Salisbury, from a Sackville search ...
https://en.m.wikipedia.org/wiki/James_Gascoyne-Cecil,_2nd_Marquess_of_Salisbury ----------
We have three of these types of Albums from my Mother's side (who were in Service, Butler, etc), my family members sat out on lawns in the Summer, with various sizes and styles of houses behind,
including those houses the Family were visiting too, like the 'in-Laws' houses, the houses of business or political associates.
I said to my Great Aunt once, whose house is this,
they were friends of our Master.
Just because the house appears in a Cecil album, doesn't necessarily mean Cecil directly owned or occupied the house.
Mark