Yes, something like that, but there's a cupboard which seems to be in the way of your partition.
I don't think I understand what you mean, what cupboard?
It's a strange place to put a partition anyway really - right across a window.
It's not that unusual, it happens quite often when refurbishing old houses and sub-dividing spaces.
This is the oldest part of the house (the red brick part), the main house containing the master bedroom and living/dining rooms (the gault brick part) is actually an extension.