"Hullo, old chap," he said, "what's up? You look quite pale."

Old chap pointed to his arm, which was hanging lifeless by his side, and stammered:

"I don't know ... my arm's hurting me...."

"Your arm?... Badly?"

"Yes ... rather ... it's my right arm...."

He tried to lift it, but could not. Shears felt it, gently at first and then more roughly, "to see exactly," he said, "how much it hurts." It hurt exactly so much that Wilson, on being led to a neighbouring chemist's shop, experienced an immediate need to fall into a dead faint.

The chemist and his assistant did what they could. They discovered that the arm was broken and that it was a case for a surgeon, an operation and a hospital. Meanwhile, the patient was undressed and began to relieve his sufferings by roaring with pain.

"That's all right, that's all right," said Shears, who was holding Wilson's arm. "Just a little patience, old chap ... in five or six weeks, you won't know that you've been hurt.... But I'll make them pay for it, the scoundrels!... You understand.... I mean him especially ... for it's that wretched Lupin who's responsible for this.... Oh, I swear to you that if ever...."

He interrupted himself suddenly, dropped the arm, which gave Wilson such a shock of pain that the poor wretch fainted once more, and, striking his forehead, shouted:

"Wilson, I have an idea.... Could it possibly...?"