but when he had wept for some time he told himself that this crying would do no good ; it was his duty to avenge his father 's murder , and this he determined to do . he looked about for some clue which would lead him to discover the murderer . looking up at the tree he noticed that the best fruit had gone , and that all around lay bits of peel and numerous seeds strewn on the ground as well as the unripe persimmons which had evidently been thrown at his father . then he understood that the monkey was the murderer , for he now remembered that his father had once told him the story of the rice - dumpling and the persimmon - seed . the young crab knew that monkeys liked persimmons above all other fruit , and he felt sure that his greed for the coveted fruit had been the cause of the old crab 's death . alas !
avenge his father 's death .
what was the crab's son determined to do ?
what was the crab's son determined to do ?