Hey DG, am I right in assuming that you're the Hammer Horror expert around here? Well anyway I'm trying to find a film, one that I watched as a child, so the information is scant to say the least, I'll put down what I know about it and if anyone can help me... great.
I think its a Hammer Horror film (it might not be)
All that I remember is this..
Sepia color tone
Two old people (man and wife I think) in a room.
One of them poisons the other
No dialogue (from what I remember)
The house may be isolated, may be on a hill.
I feel like it was the opening scene to a film, but cannot be sure. Scene probably only lasts a few minutes.
As I'm typing the above I'm realizing what a futile effort this is - given the lack of info. Anyway, worth a shot, maybe someone will recognize it.