They say the darkest hour is just before the dawn, and caliginous thoughts often swirled through his murky, insomniac mind as he lay awake …

Today's crossword is a stinker.

Large companies of them often passed to Burlington from their camping ground a little west of us, and would stop for something to eat, asking first for doughnuts and cow's grease (butter).

Select a suitable independent set / and use part (b) to show that the graph in Fig. 11.81 (known as the Herschel graph) has no Hamilton cycle.