This stone is on Peel Rise. There's a concrete staircase that comes down the hill, a shortcut from the Hong Kong trail to this part of Peel Rise. On the western side of Peel Rise you'll see this stone in the bank.
On top there is '<- 25 ->', pointing along Peel Rise.
On one side is '<- 24', pointing in the direction the HK Trail takes as it follows the curved catchwater across the stream.