At number 4 Whitehall, in the meeting hall of Scotland Yard, a group of people sat on both sides of a long conference table, the chairs packed tightly, with not a single empty spot to be found.
From east to west, one could first see four Assistant Commissioners in charge of important departments at Scotland Yard and their assistants.
Moving further down, there were over a dozen Police Superintendents responsible for the specific command and management of security in London's major areas.
Although they appeared calm, from their slightly trembling hands and their awkward sitting posture, one could guess their anxious state of mind.
At the very head of the conference table sat Colonel Charles Rowan, the Commissioner of the Greater London Police Department, along with his Deputy Commissioner, Sir Richard Mayne.
They had just returned under pouring rain from the Home Office, and their grim expressions revealed that Sir Peel had certainly not spoken kindly to them.