The castle was built out of quarried stone taken from the hill and that area was also a great place to play in as we grew up. I presume it is the same today, unless they have built houses along the back of the koppie. The entrance to the castle was up a ramp and a small balcony leading to the front door. Just inside the door there is a stairway to the second floor on your left and straight ahead you walked into the kitchen. The height of the passage way is quite low, so I presume the builder was a short person.
I lived at 130 Highland Road, right across from the Castle from 1942 until about 1965 when I left to travel the world. The Castle to me was a great playground as I grew up. We spent a lot of time searching for the secret passage way into the Castle (every castle has a secret entrance) but after all the years of searching, we never found it. Below the Castle on the side of the hill facing Kensington there was an open air covered balcony. We checked every stone and bush around it, hoping to be the first to find the secret tunnel but in the end gave up.