eight o'clock
`` Electricity ? '' Tom pricked up his ears . `` Not half a bad idea . If you 'll help me we can polish off the letters in an hour or so , and be free by eight o'clock . '' They set to work , and between them disposed of the correspondence . It was a great relief to Erica after her long day 's work to be out in the cool evening air . The night was fine but very windy , indeed the sudden gusts at the street corners made her glad to take Tom 's arm .