At all events, after some parley, the Clean Linen Store sergeant (who was less of an ogre than he pretended) offered to strike a bargain with me. If I would count all the pillow-cases, in and out of use, in my ward, and bring him the total, he would compare the said total with the figures in his ledger. Those figures he would not divulge to me. But if the number I announced was three short of the number in his ledger, he would give me the three, and say no more about it. The bargain seemed a fair one. In Sister's absence I spent a precious half-hour of what should have been my "afternoon off" in counting all the pillow-cases I could find in the ward. A good-natured probationer, who sympathised with me in my difficulties (she too had suffered), counted them also. A convalescent patient interested himself in the problem: he also went the round of the beds, and investigated the cupboard, counting all the pillow-cases. We three each arrived at the same total. Armed with this total I marched back to the sergeant in the Clean Linen Store. He turned up his ledger and ran his finger down the page till he came to the entry of pillow-cases opposite to my ward. And then he laughed a laugh of fiendish glee. "Do you know," he said, "that instead of having three pillow-cases too few, you've seven too many!" Such are the traps set by the business man, the expert of ledgers, for the innocent amateur. We had actually got more pillow-cases than we were entitled to. All unwittingly, in my eagerness to placate Sister, I had published the mild chicanery in which she had indulged on behalf of her ward. The sergeant, growing grey in the solution of these abstruse mathematical and psychological mysteries, had suspected this Sister all along. He enlightened me. She had recently been transferred from another ward--and in her going had (against the rules) wafted with her a small selection of that ward's property.... And now there would be a surprise stocktaking in her new ward: the seven surplus pillow-cases--and perhaps other loot--would have to be explained. Sister, in short, was in for a _mauvais quart d'heure_. It was a suitable penalty for her crossness. It should have taught her the perils of crossness. With regret I add that she did not envisage the episode in that light. She was merely rather crosser than before. It was without any profound sorrow that I soon afterwards bade her farewell, on her departure to overseas spheres of activity. But she had at least afforded me a lesson in the importance of accuracy over my dirty and clean linen bundles. Never again would I risk the ordeal of a surprise stocktaking; never again would I risk a combat with a ledger-fortified sergeant; never again would I risk any attempt at the tortuous in my dealings with the classifications of the eighty-one items on the tear-off leaf of that dire volume, the _Check Book for Hospital Linen_. IX ON BUTTONS