... (1) four friends and... (2) had come across a loose floor - board at the back of the class room, and when... (3) prised... (4) up with the blade of a pocket

There are four friends and other had come across a loose floor - board at the back of the class room, and when... (3) prised... (4) up with the blade of a pocket-knife,.. (5) discovered a big hollow space underneath. This,... (6) decided, would be secretly (7) secret hiding place for sweets and other small treasures such as conkers and monkey-nut and birds's eggs. Every afternoon, the five of them (8) would wait until the classroom had emptied, then... (9) would lif up the floor-board and examine... (10) secret hoard, perhaps adding to keep or taking something away.

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