nearly one o'clock
Zircon drew a line on the map connecting the southern tip of the mountain and the airport tower . Then , with that as his base line , it was easy to draw two lines at the correct angles from each of the points . The transit 's position was where the two lines intersected . By the time the scientist had finished , it was nearly one o'clock . The three walked to the detonator . `` Pull the handle up , '' Zircon directed . Rick did so .