Gimblet shrugged his shoulders as he went upstairs again. After all, the matter was of no great consequence.
The widow was a cool hand, certainly, he thought, to come to him and propose he should steal for her what she wanted; but the fact of her having done so made it on the whole improbable that she was a thief, or she would not have had need of him. She was certainly a person of questionable principles, and it seemed likely that in one way or another a theft would be committed through her agency, if not by herself, as soon as the opportunity presented itself. She was, in fact, a woman on whom the police might do worse than keep an eye; but, reflected Gimblet, he was not the police, and the dishonesty of this scheming widow was really no concern of his. As he reached his door, a postman was leaving it, and two or three letters had been pushed through the flap. He let himself in and took them out of the box. They were not of great importance. A bill, an appeal for a subscription to some charity, a couple of advertisements and the catalogue of a sale of pictures in which he was interested. He turned over the leaves slowly, holding the pamphlet sideways from time to time to look at the photographs which illustrated some of the principal lots.
Presently he turned and went back into his room. He sat down in his favourite arm-chair near the window, where he habitually passed so much time gazing out on to the smooth surface of the river, and fell to ruminating on the problem presented by Lord Ashiel's story.
For a long while he sat on, huddled in the corner of an arm-chair, his elbows on the arm, his chin resting on his hand, and in his eyes the look of one who wrestles with obscure and complicated problems of mental arithmetic. From time to time, but without relaxing his expression of concentrated effort, he stretched out long artistic fingers to a box on the table, took from it a chocolate, and transferred it mechanically to his mouth. He always ate sweets when he had a problem on hand. He was trying to think of some means by which his client could be protected from the mysterious danger that threatened him; that it was a very real danger, Gimblet accepted without question; he had only seen Lord Ashiel twice in his life, but it was quite enough to make him certain that here was a man whom it would take a great deal to alarm. This was no boy crying "wolf" for the sake of making a stir.
But the more he thought, the more he saw that there was nothing to be done. A word to the police would suffice, no doubt, to precipitate matters; for, if the Nihilist Society which threatened Lord Ashiel contemplated his destruction, a hint that he might be already taking reciprocal measures would not be likely to make them feel more mercifully towards him. It was obvious that Ashiel would look with suspicion upon any Russian who might approach him, but Gimblet determined to write him a line of warning against foreigners of any description. Still, these societies sometimes had Englishmen amongst their members, and ways of enforcing obedience upon their subordinates which made any decision they might come to as good as carried out almost as soon as it was uttered.
The detective's cogitations were disturbed by Higgs, who had returned, and now brought him in some tea. He poured himself out half a cup, which he filled up with Devonshire cream. He had a peculiar taste in food, and was the despair of his excellent cook, but on this occasion he ate none of the cakes and bread and butter she had provided, the chocolates having rather taken the edge off his appetite.
From where he sat he could see, through the open window, the broad grey stretches of the river, with a barge going swiftly down on the tide; brown sails turned to gleaming copper by the slanting rays from the West. The hum and rattle of the streets came up to him murmuringly; now and then a train rumbled over Charing Cross Bridge, and the whistle of engines shrilled out above the constant low clamour of the town.
Gimblet leant out of the window and watched the barge negotiate the bridge. Then he returned to his chair, and taking Lord Ashiel's envelope out of his pocket looked it over thoughtfully before opening it. He had no doubts as to what it contained; he had been on the point of reminding the peer that he had forgotten to give him the key of the cipher he had spoken of when the widow's ring at the door had driven him to a hurried retreat, but he had not considered the omission of any particular significance. His client would certainly discover it and either return to give him the key, or send it to the flat.
It would probably be some time before it was required for use here. In the meantime, thought Gimblet, he would have a look at it before locking it away in the safe.
He turned over the envelope. To his surprise, the flap was open and the glue had obviously never been moistened.