at cold experiment…room； as he now always called it。
But her husband went on as if he had not heard her； and she gave up trying to listen to what was going on above。
〃It wouldn't be very pleasant to run up against such a party as that in the fog； eh； Ellen？〃 He spoke as if the notion had a certain pleasant thrill in it after all。
〃What stuff you do talk！〃 said Mrs。 Bunting sharply。 And then she got up。 Her husband's remarks had disturbed her。 Why couldn't they talk of something pleasant when they did have a quiet bit of time together？
Bunting looked down again at his paper； and she moved quietly about the room。 Very soon it would be time for supper； and to…night she was going to cook her husband a nice piece of toasted cheese。 That fortunate man； as she was fond of telling him； with mingled contempt and envy； had the digestion of an ostrich； and yet he was rather fanciful； as gentlemen's servants who have lived in good places often are。
Yes； Bunting was very lucky in the matter of his digestion。 Mrs。 Bunting prided herself on having a nice mind； and she would never have allowed an unrefined word … such a word as 〃stomach；〃 for instance； to say nothing of an even plainer term … to pass her lips； except； of course； to a doctor in a sick…room。
Mr。 Sleuth's landlady did not go down at once into her cold kitchen； instead； with a sudden furtive movement； she opened the door leading into her bedroom； and then； closing the door quietly； stepped back into the darkness； and stood motionless； listening。
At first she heard nothing； but gradually there stole on her listening ears the sound of someone moving softly about in the room just overhead； that is； in Mr。 Sleuth's bedroom。 But； try as she might； it was impossible for her to guess what the lodger was doing。
At last she heard him open the door leading out on the little landing。 She could hear the stairs creaking。 That meant； no doubt； that Mr。 Sleuth would pass the rest of the evening in the cheerless room above。 He hadn't spent any time up there for quite a long while…in fact； not for nearly ten days。 'Twas odd he chose to…night； when it was so foggy； to carry out an experiment。
She groped her way to a chair and sat down。 She felt very tired … strangely tired； as if she had gone through some great physical exertion。
Yes； it was true that Mr。 Sleuth had brought her and Bunting luck； and it was wrong； very wrong； of her ever to forget that。
As she sat there she also reminded herself； and not for the first time； what the lodger's departure would mean。 It would almost certainly mean ruin； just as his staying meant all sorts of good things； of which physical comfort was the least。 If Mr。 Sleuth stayed on with them； as he showed every intention of doing； it meant respectability； and； above all； security。
Mrs。 Bunting thought of Mr。 Sleuth's money。 He never received a letter； and yet he must have some kind of income … so much was clear。 She supposed he went and drew his money； in sovereigns； out of a bank as he required it。
Her mind swung round； consciously； deliberately； away from Mr。 Sleuth。
The Avenger？ What a strange name！ Again she assured herself that there would come a time when The Avenger； whoever he was； must feel satiated； when he would feel himself to be； so to speak； avenged。
To go back to Mr。 Sleuth； it was lucky that the lodger seemed so pleased； not only with the rooms； but with his landlord and landlady … indeed； there was no real reason why Mr。 Sleuth should ever wish to leave such nice lodgings。 ******
Mrs。 Bunting suddenly stood up。 She made a strong effort； and shook off her awful sense of apprehension and unease。 Feeling for the handle of the door giving into the passage she turned it； and then； with light； firm steps； she went down into the kitchen。
When they had first taken the house； the basement had been made by her care； if not into a pleasant； then； at any rate； into a very clean place。 She had had it whitewashed； and against the still white walls the gas stove loomed up； a great square of black iron and bright steel。 It was a large gas…stove； the kind for which one pays four shillings a quarter rent to the gas company； and here； in the kitchen； there was no foolish shilling…in…the…slot arrangement。 Mrs。 Bunting was too shrewd a woman to have anything to do with that kind of business。 There was a proper gas…meter； and she paid for what she consumed after she had consumed it。
Putting her candle down on the well…scrubbed wooden table； she turned up the gas…jet； and blew out the candle。
Then； lighting one of the gas…rings； she put a frying…pan on the stove； and once more her mind reverted； as if in spite of herself； to Mr。 Sleuth。 Never had there been a more confiding or trusting gentleman than the lodger； and yet in some ways he was so secret； so … so peculiar。
She thought of the bag … that bag which had rumbled about so queerly in the chiffonnier。 Something seemed to tell her that tonight the lodger had taken that bag out with him。
And then she thrust away the thought of the bag almost violently from her mind； and went back to the more agreeable thought of Mr。 Sleuth's income； and of how little trouble he gave。 Of course； the lodger was eccentric； otherwise he wouldn't be their lodger at all … he would be living in quite a different sort of way with some of his relations； or with a friend in his own class。
While these thoughts galloped disconnectedly through her mind； Mrs。 Bunting went on with her cooking； preparing the cheese； cutting it up into little shreds； carefully measuring out the butter； doing everything； as was always her way； with a certain delicate and cleanly precision。
And then； while in the middle of toasting the bread on which was to be poured the melted cheese； she suddenly heard sounds which startled her； made her feel uncomfortable。
Shuffling； hesitating steps were creaking down the house。
She looked up and listened。
Surely the lodger was not going out again into the cold and foggy night … going out； as he had done the other evening； for a second time？ But no； the sounds she heard； the sounds of now familiar footsteps； did not continue down the passage leading to the front door。
Instead … Why； what was this she heard now？ She began to listen so intently that the bread she was holding at the end of the toasting…fork grew quite black。 With a start she became aware that this was so； and she frowned； vexed with herself。 That came of not attending to one's work。
Mr。 Sleuth was evidently about to do what he had never yet done。 He was coming down into the kitchen。
Nearer and nearer came the thudding sounds； treading heavily on the kitchen stairs； and Mrs。 Bunting's heart began to beat as if in response。 She put out the flame of the gas…ring； unheedful of the fact that the cheese would stiffen and spoil in the cold air。
Then she turned and faced the door。
There came a fumbling at the handle； and a moment later the door opened； and revealed； as she had at once known and feared it would do； the lodger。
Mr。 Sleuth looked even odder than usual。 He was clad in a plaid dressing…gown； which she had never seen him wear before； though she knew that he had purchased it not long after his arrival。 In his hand was a lighted candle。
When he saw the kitchen all lighted up； and the woman standing in it； the lodger looked inexplicably taken aback； almost aghast。
〃Yes； sir？ What can I do for you； sir？ I hope you didn't ring； sir？〃
Mrs。 Bunting held her ground in front of the stove。 Mr。 Sleuth had no business to come like this into her kitchen； and she intended to let him know that such was her view。
〃No； I … I didn't ring；〃 he stammered awkwardly。 〃The truth is； I didn't know you were here； Mrs。 Bunting。 Please excuse my costume。 My gas…stove has gone wrong； or； rather； that shilling…in…the…slot arrangement has done so。 So I came down to see if you had a gas…stove。 I am going to ask you to allow me to use it to…night for an important experiment I wish to make。〃
Mrs。 Bunting's heart was beating quickly … quickly。 She felt horribly troubled； unnaturally so。 Why couldn't Mr。 Sleuth's experiment wait till the morning？ She stared at him dubiously； but there was that in his face that made her at once afraid and pitiful。 It was a wild； eager； imploring look。
〃Oh； certainly； sir； but you will find it very cold down here。〃
〃It seems most pleasantly warm；〃 he observed； his voice full of relief； 〃warm and cosy； after my cold room upstairs。〃
Warm and cosy？ Mrs。 Bunting stared at him in amazement。 Nay； even that cheerless room at the top of the house must be far warmer and more cosy than this cold underground kitchen could possibly be。
〃I'll make you a fire； sir。 We never use the grate； but it's in perfect order； for the first thing I did after I came into the house was to have the chimney swept。 It was terribly dirty。 It might have set the house on fire。〃 Mrs。 Bunting's housewifely instincts were roused。 〃For the matter of that； you ought to have a fire in your bedroom this cold night。〃
〃By no means … I would prefer not。 I certainly do not want a fire there。 I dislike an open fire； Mrs。 Bunting。 I thought I ha