seven o'clock
Kit 's opinion of the key was the same as that already formed by Clo , and the girl was wild to test it . She snatched her own key from its lock , to try it in Kit 's door . It went in , but stopped at the critical turn . There were two more rooms on this floor ; a small one opposite Clo 's , tenanted by a young man who went to work at seven o'clock ; and another still smaller , used as a storeroom -- a refuge for trunks , dust-pans , and brooms . The early bird never locked his door , but his key fell short of success . The storeroom key remained . It did not fail .