paragraph: We had ascertained from the lady that she went down upon the Monday by the train which leaves Waterloo at 9:50, so I started early and caught the 9:13. At Farnham Station I had no difficulty in being directed to Charlington Heath. It was impossible to mistake the scene of the young lady's adventure, for the road runs between the open heath on one side and an old yew hedge upon the other, surrounding a park which is studded with magnificent trees. There was a main gateway of lichen-studded stone, each side pillar surmounted by mouldering heraldic emblems, but besides this central carriage drive I observed several points where there were gaps in the hedge and paths leading through them. The house was invisible from the road, but the surroundings all spoke of gloom and decay. The heath was covered with golden patches of flowering gorse, gleaming magnificently in the light of the bright spring sunshine. Behind one of these clumps I took up my position, so as to command both the gateway of the Hall and a long stretch of the road upon either side. It had been deserted when I left it, but now I saw a cyclist riding down it from the opposite direction to that in which I had come. He was clad in a dark suit, and I saw that he had a black beard. On reaching the end of the Charlington grounds, he sprang from his machine and led it through a gap in the hedge, disappearing from my view. 
question: Why could the house not be seen from the road?
answer: Hedges