eleven
until twelve
`` Even that is too soon for safety , '' said the Doctor back over his shoulder , for already he had started downward . It was nearly twelve o'clock when they stopped again for rest . At this time the valley appeared about seven or eight thousand feet deep : they estimated themselves to be slightly more than half-way down . From eleven until twelve they had momentarily expected some disturbing phenomena attendant upon the removal of the ring by the Banker from the clubroom to its place in the Museum . But nothing unusual had occurred . `` He probably decided to leave it alone for a while , '' commented the Big Business Man , as they were discussing the matter . `` Glad he showed that much sense . ''