No, the small box is in the shed next to Liam, on the ground to the right. Use the key he gave you to open it, and remove the scroll, then Liam should talk about the wall markings and the trees, and IIRC, the white horse on the stone.
FGM
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Come visit us at
Mystery Manor My candle burns at both ends;
It will not last the night;
But, ah, my foes, and, oh, my friends -
it gives a lovely light.
Edna Saint Vincent Millay