Sisters don't need words. They have perfected a language of snarls and smiles and frowns and winks - expressions of shocked surprise and incredulity and disbelief. Sniffs and snorts and gasps and sighs - that can undermine any tale you're telling.

You are asleep. Deep, deep asleep - and then the world caves in. The cat has leapt from the top window onto your stomach. He is saturated. He is hungry. He taps you into full wakefulness with a sodden paw "Could you open a can?"

A younger sister is someone to use as a guinea-pig in trying sledges and experimental go-carts. Someone to send on messages to Mum. But someone who needs you - who comes to you with bumped heads, grazed knees, tales of persecution. Someone who trusts you to defend her. Someone who thinks you know the answers to almost everything.

One small cat changes coming home to an empty house to coming home.

If your sister is in a tearing hurry to go out and cannot catch your eye, she's wearing your best sweater.

For every person who has ever lived there has come, at last, a spring he will never see. Glory then in the springs that are yours.

Be wary of the horse with a sense of humor.