or not nothing , precisely ; plenty of things a horse , its owner , the two old men ( still grumbling about modern life ) , a slave tutor with a reluctant boy in tow , a couple of women whose heads were covered by bright saffron veils ; his trained memory identified them , enumerated them , and then , flicking back , his eyes picked up a pair of legs under the horse 's belly , legs that did n't belong to the horse , and he was off again , nearly knocking over one of the women in his haste .