But it was neither green apples nor gooseberries which had given Hal the very uncomfortable sensations from which he was suffering.  That, however, he did not explain to nurse; and feeling very wretched and unhappy he wandered out into the garden, and flung himself under a big, shady elm-tree.  The others were nowhere in sight, and he felt injured that they should, even after his conduct of the morning, have left him to himself.