'The last time I saw you was just as I was starting with a score of others to make our way to join the Earl of Mar's army at Perth. I have seen many an army since, but never did I see sixteen thousand finer fighting men than were there assembled. The Laird of Mackintosh brought five hundred clansmen from Inverness shire, the Marquis of Huntly had five hundred horse and two thousand foot, and the Earl Marischal had a thousand men. The Laird of Glenlyon brought five hundred Campbells, and the Marquis of Tullibardine fourteen hundred, and a score of other chiefs of less power were there with their clansmen.请问five hundred horse and thousand foot中的horse 与foot为什么是单数形式？其中foot在这里到底是什么意思？

这里，five hundred horse and two thousand foot 是指500个骑兵和2000个步兵的意思。horse and foot 是指骑兵和步兵的意思，horse ，foot在这里做的是集合词,是名词的词性.所以，就是用这种行式。在此处用法是正确的。