At an early stage of his operations, Pratt had found that even the cleverest of schemers cannot work unaided. It had been absolutely necessary to have some tool close at hand to Normandale Grange and its inhabitants; to have some person there upon whom he could depend for news. He had found that person, that tool, in Esther Mawson, who, as Mrs. Mallathorpe's maid, had opportunities which he at once recognized as being likely to be of the greatest value to him. The circumstances of Harper Mallathorpe's death had thrown Pratt and the maid together, and he had quickly discovered that she was to be bought, and would do anything for money. He had soon come to an understanding with her; soon bargained with her, and made her a willing accomplice in certain of his schemes, without letting her know their full meaning and extent: all, indeed, that she had learned from Pratt was that he had some considerable hold on her mistress. But it is dangerous work to play with edged tools, and if Pratt had only known it, he was running great risks in using Esther Mawson as a semi-accomplice. Esther Mawson was in constant touch with her mistress, and Mrs. Mallathorpe, afraid of her daughter, and not greatly in sympathy with her, badly needed a confidante. Little by little the mistress began to confide in the maid, and before long Esther Mawson knew the secret--and thenceforward she played a double game. Pratt found her useful in arranging meetings with Mrs. Mallathorpe unknown to Nesta, and he believed her to be devoted to him. But the truth was that Esther Mawson had only one object of devotion--herself--and she was waiting and watching for an opportunity to benefit that object--at Pratt's expense. Pratt knew nothing of this as he slowly made his way to Normandale that morning. Having plenty of time he went by devious and lonely roads and by-lanes. Eventually he came to the boundary of Normandale Park at a point far away from the Grange. There he dismounted, hid his bicycle in a coppice wherein he had often left it before, and went on towards the house through the woods and plantations. He knew every yard of the ground he traversed, and was skilled in taking cover if he saw any sign of woodman or gamekeeper. And in the end, just as one o'clock chimed from the clock over the stables, he came to a quiet spot in the shrubberies behind the Grange, and found Esther Mawson waiting for him in an old summer-house in which they had met on previous and similar occasions. Esther Mawson immediately realized that something unusual was in the air. Clever as Pratt was at concealing his feelings, she was cleverer in seeing small signs, and she saw that this was no ordinary visit. "Anything wrong?" she asked at once. "Bit of bother--nothing much--it'll blow over," answered Pratt, who knew that a certain amount of candour was necessary in dealing with this woman. "But--I shall have to be away for a bit--week or two, perhaps." "You want to see her?" inquired Esther.