Derby's Old West End

My father had a scrap-yard in Nuns Street. It was right next to the bridge over Markeaton Brook. I remember always asking to be picked up so I could look over the bridge - I don't know why! Markeaton Brook was filled with old bed-steads and all sorts of rubbish in those days - but it always fascinated me.  There was an old building opposite Dad's scrap-yard. I remember it as Bennet and Sayers - but know nothing else about it. Can anyone enlighten me?