Heigh-ho! what has happened? Bertie and Minnie, who seemed only just now to be flying over the ground, have disappeared, as if by magic.

This is how it was. Bertie and Minnie, rushing along so eagerly, did not notice that they had got to the bottom of the field; and at the bottom of the field was a ditch; and into the ditch they went head over heels, rolling one over the other.

And at the bottom of the ditch there was some water left by the rain—nasty yellow water.