“Once he was a mechanical engineer, but he got very few clients, and it didn’t pay.”

“There, now, is a suggestion. Would it be very unlikely that your husband, trained mechanician as he is, may have reverted so far to his old profession as to be conceiving some new invention? And in that case, what more probable than that he would lock himself securely in his office to work out his idea, and take no notice of visitors knocking, in order to admit nobody who might learn something of what he was doing? Does he keep a clerk or office boy?”

“No, he never has since he left the mechanical engineering.”

“Well, Mrs. Geldard, I’m sorry I have no more time now, but I must earnestly repeat my advice. Come to an understanding with your husband in a straightforward way as soon as you possibly can. There are plenty of private inquiry offices about where they will watch anybody, and do almost anything, without any inquiry into their clients’ motives, and with a single eye to fees. I charge you no fee, and advise you to treat your husband with frankness.”

Mrs. Geldard did not seem particularly satisfied, though Hewitt’s rejection of a consultation fee somewhat softened her. She left protesting that Hewitt didn’t know the sort of man she had to deal with, and that, one way or another, she must have an explanation.

“Come, we’ll get to lunch,” said Hewitt. “I’m afraid my suggestion as to Mr. Geldard’s probable occupation in his office wasn’t very brilliant, but it was the pleasantest I could think of for the moment, and the main thing was to pacify the lady. One does no good by aggravating a misunderstanding of that sort.”

“Can you make any conjecture,” I said, “at what the trouble really is?”

Hewitt raised his eyebrows and shook his head. “There’s no telling,” he said. “An angry, jealous, pragmatical woman, apparently, this Mrs. Geldard, and it’s impossible to judge at first sight how much she really knows and how much she imagines. I don’t suppose she’ll take my advice. She seems to have worked herself into a state of rancour that must burst out violently somewhere. But lunch is the present business. Come.”

The next day I spent at a friend’s house a little way out of town, so that it was not till the following morning, about the same time, that I learned from Hewitt that Mrs. Geldard had called again.

“Yes,” he said; “she seems to have taken my advice in her own way, which wasn’t a judicious one. When I suggested that she should speak frankly to her husband, I meant her to do it in a reasonably amicable mood. Instead of that, she appears to have flown at his throat, so to speak, with all the bitterness at her tongue’s disposal. The natural result was a row. The man slanged back, the woman threatened divorce, and the man threatened to leave the country altogether. And so yesterday Mrs. Geldard was here again to get me to follow and watch him. I had to decline once more, and got something rather like a slanging myself for my pains. She seemed to think I was in league with her husband in some way. In the end I promised—more to get rid of her than anything else—to take the case in hand if ever there were anything really tangible to go upon; if her husband really did desert her, you know, or anything like that. If, in fact, there were anything more for me to consider than these spiteful suspicions.”