those hours of unsleepthroughable loudness allowed him ample time to wonder about everything from when katherine last thought of him to the number of grammatically correct anagrams of rooster.37 around 7 a.m. , as the rooster ( or perhaps there was more than one-perhaps they crowed in shifts ) entered its third hour of shrieking cries , colin stumbled into the bathroom , which also connected to hassan 's bedroom .