At Prep School in those days, a parcel of tuck was sent once a week by anxious mothers to their ravenous little sons, and an average tuck-box would probably contain, at almost any time, half a home-made currant cake, a packet of squashed-fly biscuits, a couple of oranges, an apple, a banana, a pot of strawberry jam or Marmite, a bar of chocolate, a bag of Liquorice Allsorts and a tin of Bassett’s lemonade powder. An English school in those days was purely a money-making business owned and operated by the Headmaster. It suited him, therefore, to give the boys as little food as possible himself and to encourage the parents in various cunning ways to feed their offspring by parcel-post from home.
It was important for parents to send their children food from home because __________.