Miss Climpson rose from the table, paid her bill and hurried out to buy the glasses, remembering that it was Saturday. Having secured a pair which hid her eyes effectively without looking exaggeratedly mysterious, she made for her rooms in St. George’s Square, to choose suitable clothing for her adventure. She realised, of course, that she could hardly start work till Monday—Saturday afternoon and Sunday are hopeless from the collector’s point of view.

The choice of clothes and accessories occupied her for the better part of the afternoon. When she was at last satisfied she went downstairs to ask her landlady for some tea.

“Certainly, miss,” said the good woman. “Ain’t it awful, miss, about this murder?”

“What murder?” asked Miss Climpson, vaguely.

She took the Evening Views from her landlady’s hand, and read the story of Vera Findlater’s death.

Sunday was the most awful day Miss Climpson had ever spent. An active woman, she was condemned to inactivity, and she had time to brood over the tragedy. Not having Wimsey’s or Parker’s inside knowledge, she took the kidnapping story at its face value. In a sense, she found it comforting, for she was able to acquit Mary Whittaker of any share in this or the previous murders. She put them down—except, of course, in the case of Miss Dawson, and that might never have been a murder after all—to the mysterious man in South Audley Street. She formed a nightmare image of him in her mind—blood-boltered, sinister, and—most horrible of all—an associate and employer of debauched and brutal assassins. To Miss Climpson’s credit be it said that she never for one moment faltered in her determination to track the monster to his lurking-place.

She wrote a long letter to Lord Peter, detailing her plans. Bunter, she knew, had left 110A Piccadilly, so, after considerable thought, she addressed it to Lord Peter Wimsey, c/o Inspector Parker, The Police-Station, Crow’s Beach. There was, of course, no Sunday post from Town. However, it would go with the midnight collection.

On the Monday morning she set out early, in her old clothes and her spectacles, for South Audley Street. Never had her natural inquisitiveness and her hard training in third-rate boarding-houses stood her in better stead. She had learned to ask questions without heeding rebuffs—to be persistent, insensitive and observant. In every flat she visited she acted her natural self, with so much sincerity and such limpet-like obstinacy that she seldom came away without a subscription and almost never without some information about the flat and its inmates.

By tea-time, she had done one side of the street and nearly half the other, without result. She was just thinking of going to get some food, when she caught sight of a woman, about a hundred yards ahead, walking briskly in the same direction as herself.

Now it is easy to be mistaken in faces, but almost impossible not to recognise a back. Miss Climpson’s heart gave a bound. “Mary Whittaker!” she said to herself, and started to follow.