'Not they. They have their own snug secret way, and they won't be hurried. I know Germans, and they are mad about working to a plan. Where the devil can I get a book of Tide Tables?'
Whittaker brightened up. 'It's a chance,' he said.'Let's go over to the Admiralty.'
We got into two of the waiting motor-cars—all but Sir Walter, who went off to Scotland Yard—to 'mobilize MacGillivray', so he said. We marched through empty corridors and big bare chambers where the charwomen were busy, till we reached a little room lined with books and maps. A resident clerk was unearthed, who presently fetched from the library the Admiralty Tide Tables. I sat at the desk and the others stood round, for somehow or other I had got charge of this expedition.