As a boy, resident in Saltcoats, my father and I would walk up Dalry Road, turn right towards "Middlepart Farm" and continue along the back roads to Kerelaw. I recall the old abandoned house with a large portico (?) out front and upon entering a large staircase directly in front of you. I also recall a very large chestnut tree at the back of the house.
Thanks to those who contributed to jog my 75-year old memory.