Author's Note: written for a prompt on Sherlock's Chagrin prompt on LiveJournal.
April 1st, for me, was a day like any other…I worked my usual hours at my practice and had dinner with Holmes in the evening. Afterwards, he was lounging in his chair in front of the fire, about to light his after-dinner pipe. I declined his invitation to join him, as I'd not slept well the night before due to rainy weather, and decided to turn in early in hopes of making up for lost sleep. I bade Holmes good night and entered my room. Just as I removed my cufflinks and was about to put them in a box on my bureau, my bedroom door burst open with such force that it nearly came off the hinges. Turning around in astonishment, I beheld Holmes, smouldering pipe in hand and an indescribable expression on his face.
"What is the matter?" I inquired, somewhat alarmed.
"Watson, this time, you've gone too far!" he declared, indignantly.
I was entirely puzzled. "Whatever do you mean?"
"Is this yet another attempt to force me to curtail my smoking, Doctor?" he exclaimed, brandishing his pipe at me. "This time, you've gone too far!"
I searched my memory but still had no idea what he was referring to. "What on earth do you mean by that?"
"As if you don't know!" he hissed. "This package of tobacco you picked up at Bradstreet's for me today is composed of equal parts of tobacco and tea leaves! Now I rather doubt Bradstreet's is playing April Fool's pranks on its customers…so is this yet another attempt of yours as I said…or have you now descended to juvenile pranks, Doctor?"
"No…but you see, I was busy today and met Wiggins en route to the tobacconist…he offered to pick up the package for me…why that little…little…" I could not think of a suitable epithet.
Holmes burst out laughing at my (no doubt, quite dismayed) expression, and I could not resist joining in the merriment.