They turned into the street where Henry had left Hilary. The houses stood in their close rows, a few people went up and down, but there was no girl in a brown tweed coat and cap.

‘I left Hilary here – ’

‘She must have gone round the next corner. She would walk to keep herself warm,’ said Miss Silver.

Henry felt an odd relief. He had expected to see Hilary. In some obscure Way he felt as if he had missed a step in the dark. He was jarred, and a little angry. Miss Silver’s reasonable explanation was reassuring.

‘If we wait here, she’ll come back,’ he said.

He went on telling her about Frank Everton’s wife – ‘She says Bertie Everton’s been promising them money. He kept putting Frank off because he said he couldn’t do anything till the will was proved. Then they found out that it had been proved, and Bertie put them off with promises. He said he wanted Frank to go abroad, and Frank wouldn’t because of her. That was before they were married, and afterwards he said Glasgow was good enough for him, and he wouldn’t budge. He said all he wanted was a nice little flat and plenty of money to pay for drinks all round, and he wasn’t going overseas to please anyone.’

‘That,’ said Miss Silver, ‘is very interesting.’

Henry nodded.

‘I thought so. Of course you can’t say he was a creditable relation to have around – I mean, nothing very compromising about Bertie feeling that a good stretch of the Atlantic or the Pacific between them would make Frank less of a handicap. But there was something about the way she said it, if you know what I mean. Bertie had been very pressing, and Frank had been cocking snooks when he’d had one over the odd, and hinting at what he could say if Bertie pushed him too far.’

Miss Silver put her head a little on one side with the air of a bird who sees a plump and juicy worm.

‘Did he say what he would do, Captain Cunningham?’

‘He hinted that he could make it hot for Bertie. He said he’d done dirty work for him once too often, and that he wouldn’t have done it if he’d known what Bertie was up to -said he’d got evidence that would hang Bertie if he took it to the police. The girl Phemie says he showed her the evidence and then made her promise she wouldn’t tell anyone, because, he said, they might hang him, too, and he never meant the old man any harm.’

Miss Silver faced him on the narrow pavement, her eyes bright and alert.

‘This evidence, Captain Cunningham -did she tell you what it was?’

‘I’ve got it here,’ said Henry. He gave his limp paper parcel a bang and produced it with the air of a conjuror bringing something out of a hat.

A curious change came over Miss Silver’s expression. She put out her hand for the parcel and she opened her mouth to speak, but she neither spoke, nor did she touch the crumpled brown paper. Her hand fell to her side, her lips stayed open, and her eyes lost their brightness whilst remaining even more alert than before. She said in a quick, restless voice,

‘Captain Cunningham, where is Miss Carew?’

At once Henry was jarred again.

‘I left her here.’

‘Then where is she?’

‘She must have gone round the corner. You said so, – you said she would walk to keep herself warm.’

‘She wouldn’t go far. She ought to be here. I don’t like it, Captain Cunningham.’

Henry was off before she had finished speaking. The street ran straight for about a quarter of a mile without a side turning. His long legs took him to the end of it in a very short time. He went out of Miss Silver’s view round the left-hand corner. After an interval he crossed the head of the street again and disappeared in the opposite direction. Then he came sprinting back.

Miss Silver turned before he reached her and hurried back along the way by which they had walked together. Henry came up with her, panting. His heart thumped, ‘Hilary – Hilary – Hilary – ’ and he was afraid with that unreasoning fear which is the hardest of all to control.

‘She isn’t anywhere – Miss Silver – ’

Miss Silver began to run in an odd hen-like manner.

‘I think I ought -to tell you that -the Mercers are – in Glasgow – Captain Cunningham. In – point of fact – I – followed them – here. A police-constable is – meeting me at – their lodging – immediately. I am very apprehensive on -Mrs. Mercer’s account. If -by any chance -Miss Carew -’ The words popped out in jerks, but she ran gamely.

They came into the street where the tenement houses were, and she caught Henry by the arm and pointed.

‘That door – where the policeman is – fifth floor – on the left – ’ This took the last of her breath, but as he broke from her she snatched the brown paper parcel and tucked it under her arm.

Henry went pounding across the street, shouted to the policeman, and flung himself at the stair.

After a moment’s hesitation the policeman followed him.

Miss Silver followed the policeman.

A little while before, Hilary had been quite sure that no one could run up five flights of stairs. Henry now proceeded to smash this theory. From the moment Miss Silver mentioned her name a most devastating conviction that Hilary was in danger had driven him. It took him up the five flights at a record-breaking pace, and on the third step from the landing he heard her scream. He took those three steps in a stride and rushed the door. For a moment it held. He had the idea that someone was holding it against him, and thrust with such violence that the sudden inward swing shot Hilary and Alfred Mercer across the passage and into the kitchen. Hilary fetched up against the kitchen table gasping for breath, and Mercer, stumbling, blinded, with blood and ink running down his face clutched at his eyes with one hand and with the other lugged an ugly horn-handled knife from his pocket. A steady stream of curses poured from his lips. There was ink on the floor, there was ink on Hilary, there was ink everywhere. It seemed impossible that so much ink should have come out of one small bottle.

Henry stood for a moment stupefied, and in that moment Alfred Mercer put his other hand to the knife and got it open. Hilary tried to scream, but she couldn’t get her voice to do anything. It stayed shut up in her throat and choked her. She saw Henry take a step forward. She heard the sound of breaking glass as his heel came down on the bottle neck, and she saw Alfred Mercer gather himself up and spring. The knife flew out of his hand as Henry caught his wrist and banged his elbow against the door. And then there was a wild free fight, and a chair went down and Mercer tripped over it and Henry tripped over him. After which the Scotch policeman arrived and took charge.

Miss Silver walked in a moment later. She looked at the ink, the blood, the knife. She looked at Alfred Mercer in the big policeman’s grip. She looked at Hilary, very pale and holding on very tightly to Captain Henry Cunningham. And she said in a gentle, enquiring voice,

‘Pray, what about Mrs. Mercer?’

Hilary shuddered.

‘I think she’s dead. He – He – ’

‘I never touched her!’ said Alfred Mercer. ‘I never laid a finger on her – I swear I didn’t!’

Henry put his arm round Hilary and held her up. She was shaking from head to foot.

‘He was going -to poison her. He made her sign – a – confession – ’

‘Shut up, you!’ said the policeman, and put a hand over Alfred Mercer’s mouth.

‘He made her – write it. I saw her – at the window – she looked terrified – so I came up. She told me he-was – trying to – kill her. I wanted her – to come away. Then he came – and I hid – in the cupboard. He had that knife – and he made her write – what he said – and sign it. Then he – was going to give her something – to make her sleep – and she wouldn’t have waked up again – ever – ’

‘I see,’ said Miss Silver. She turned and went into the bedroom.

They waited in a dead silence. Hilary wished that she could stop shaking. She was so cold – that was it, she was shaking because she was cold. Nothing made you so cold as being afraid. It was horrible to be in the room with Alfred Mercer, even though he was quiet now and dabbing at his eyes with a stained handkerchief and the policeman’s hand was heavy on his shoulder.