Sherlock searched the room extensively, absorbing every detail.

'Sherlock, what are you doing?' Mycroft peered over his book at his younger brother, who appeared to be sniffing the carpet. And licking it. He wasnt really interested, but felt as though he should at least attempt to prevent his little brother from getting in trouble, or poisoning himself.

'Looking for evidence' Sherlock spoke matter-of-factly as he crawled around on his hands and knees, magnifying glass in hand.

'Evidence of what?' Mycroft asked, placing down his book, and attempting to locate the child, who had disappeared behind the sofa.

'You know what, you did it, I mummy says I need proof, so I'm finding it!'

'I have absolutely no idea what you are talking about!' Bored of his kid brother's antics, Mycroft picked up his book and tried to ignore the small child crawling over his foot.

For about a minute, Sherlock seemed content with wondering around the sitting room, but of course, good things never last.

'Ahah!' Sherlock exclaimed.

'For heavens sake, what now?' Mycroft, growing infuriated by the constant distraction, snapped at the child, but Sherlock being Sherlock didn't seem to notice.

'You have a crumb on your collar'

'So what?'

'You told mummy that you didn't eat that piece of cake. You lied. I knew it! You lied to mummy'

'Are you finished?' Mycroft asked impatiently.

'No, I promise not to tell mummy if you play pirates with me' Sherlock grabbed his wooden sword, that he had earlier disregard onto the sofa, and thrust it towards his brother.