six
o'clock
`` No doubt , '' she replied , thoughtfully . `` He will send his butler or house-steward to take them to Kew Gardens to-morrow ; but I dare say he will call and tell you himself . '' `` He is wonderfully good , '' said Katherine , feeling puzzled and oppressed . `` I will go back , then , as fast as I can , and get my work done by six o'clock ; then I may spend the evening here with you and the boys . '' `` Pray do , if you can manage it . '' Lord de Burgh 's remarkable conduct troubled Katherine a good deal . How ought she to act ?