This is one of the most asked about Children's TV series from the 1970s. The first to ask about it was Tommy who posted:
Can someone please help me with the name of a show I watched probaly in the 70's.. I can remember a boy who when he went to sleep awoke in a dream like state in a dark mansion. Outside this mansion were a ring of stones which seemed to have eyes and nothing else existed, everything was black. The boy had a notebook and when he was awake during the day anything he wrote in it appeard in the mansion later that night. Each night when he woke up the stones seemed to be getting closer to the house.