Complete the following statement. The vicar's story suggests that:

Please refer to this passage for the next three questions. 'The Adventure of the Devil's Foot' by Sir Arthur Conan Doyle (1) These were the two men who entered abruptly into our little sitting-room on Tuesday, March the 16th, shortly after our breakfast hour, as we were smoking together, preparatory to our daily excursion upon the moors. (2) 'Mr. Holmes,' said the vicar in an agitated voice, 'the most extraordinary and tragic affair has occurred during the night. (3) It is the most unheard-of business. (4) We can only regard it as a special Providence that you should chance to be here at... Show more

Please refer to this passage for the next three questions.
'The Adventure of the Devil's Foot' by Sir Arthur Conan Doyle

(1) These were the two men who entered abruptly into our little sitting-room on Tuesday, March the 16th, shortly after our breakfast hour, as we were smoking together, preparatory to our daily excursion upon the moors.
(2) 'Mr. Holmes,' said the vicar in an agitated voice, 'the most extraordinary and tragic affair has occurred during the night. (3) It is the most unheard-of business. (4) We can only regard it as a special Providence that you should chance to be here at the time, for in all England you are the one man we need.'
(5) I glared at the intrusive vicar with no very friendly eyes; but Holmes took his pipe from his lips and sat up in his chair like an old hound who hears the view-halloa. (6) He waved his hand to the sofa, and our palpitating visitor with his agitated companion sat side by side upon it. (7) Mr. Mortimer Tregennis was more self-contained than the clergyman, but the twitching of his thin hands and the brightness of his dark eyes showed that they shared a common emotion.
(8) 'Shall I speak or you?' he asked of the vicar.
(9) 'Well, as you seem to have made the discovery, whatever it may be, and the vicar to have had it second-hand, perhaps you had better do the speaking,' said Holmes.
(10) I glanced at the hastily clad clergyman, with the formally dressed lodger seated beside him, and was amused at the surprise which Holmes's simple deduction had brought to their faces.
(11) 'Perhaps I had best say a few words first,' said the vicar, 'and then you can judge if you will listen to the details from Mr. Tregennis, or whether we should not hasten at once to the scene of this mysterious affair. (12) I may explain, then, that our friend here spent last evening in the company of his two brothers, Owen and George, and of his sister Brenda, at their house of Tredannick Wartha, which is near the old stone cross upon the moor. (13) He left them shortly after ten o'clock, playing cards round the dining-room table, in excellent health and spirits. (14) This morning, being an early riser, he walked in that direction before breakfast and was overtaken by the carriage of Dr. Richards, who explained that he had just been sent for on a most urgent call to Tredannick Wartha. (15) Mr. Mortimer Tregennis naturally went with him. (16) When he arrived at Tredannick Wartha he found an extraordinary state of things. (17) His two brothers and his sister were seated round the table exactly as he had left them, the cards still spread in front of them and the candles burned down to their sockets. (18) The sister lay back stone-dead in her chair, while the two brothers sat on each side of her laughing, shouting, and singing, the senses stricken clean out of them. (19) All three of them, the dead woman and the two demented men, retained upon their faces an expression of the utmost horror—a convulsion of terror which was dreadful to look upon. (20) There was no sign of the presence of anyone in the house, except Mrs. Porter, the old cook and housekeeper, who declared that she had slept deeply and heard no sound during the night. (21) Nothing had been stolen or disarranged, and there is absolutely no explanation of what the horror can be which has frightened a woman to death and two strong men out of their senses. (22) There is the situation, Mr. Holmes, in a nutshell, and if you can help us to clear it up you will have done a great work.'
(23) I had hoped that in some way I could coax my companion back into the quiet which had been the object of our journey; but one glance at his intense face and contracted eyebrows told me how vain was now the expectation. (24) He sat for some little time in silence, absorbed in the strange drama which had broken in upon our peace.<br/>
(25) 'I will look into this matter,' he said at last. (26) 'On the face of it, it would appear to be a case of a very exceptional nature. (27) Have you been there yourself, Mr. Roundhay?'
(28) 'No, Mr. Holmes. (29) Mr. Tregennis brought back the account to the vicarage, and I at once hurried over with him to consult you.'
(29) 'How far is it to the house where this singular tragedy occurred?'
(30) 'About a mile inland.'
(31) 'Then we shall walk over together. (32) But before we start I must ask you a few question, Mr. Mortimer Tregennis.'
(33) The other had been silent all this time, but I had observed that his more controlled excitement was even greater than the obtrusive emotion of the clergyman. (34) He sat with a pale, drawn face, his anxious gaze fixed upon Holmes, and his thin hands clasped convulsively together. (35) His pale lips quivered as he listened to the dreadful experience which had befallen his family, and his dark eyes seemed to reflect something of the horror of the scene.
(36) 'Ask what you like, Mr. Holmes,' said he eagerly. (37) 'It is a bad thing to speak of, but I will answer you the truth.'

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