A ringing of the bell in, say, the kitchen might be caused by the mistress calling for service from upstairs, but it might also caused by someone pulling the wire in an intervening room.
I really do not understand what pulling the wire and intervening room mean in that sentence.
A wire ran through the walls and floors from the main room upstairs to the kitchen. When the mistress needed a servant, she pulled the wire and made a bell ring in the kitchen. Intervening rooms are rooms between the main room and the kitchen.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
A wire ran through the walls and floors from the main room upstairs to the kitchen. When the mistress needed a servant, she pulled the wire and made a bell ring in the kitchen.
Intervening rooms are rooms between the main room and the kitchen.
It's an old-fashioned system.
Clive