Here Marchmont, who had been thinking hard, with knitted brows, suddenly brightened up.

“I see your point,” said he. “You mean that if Jeffrey was as blind as that, it would have been possible for some person to substitute a false will, which he might sign without noticing the substitution.”

“That wouldn’t make the will a forgery,” growled Winwood. “If Jeffrey signed it, it was Jeffrey’s will. You could contest it if you could prove the fraud. But he said: ‘This is my will,’ and the two witnesses read it and have identified it.”

“Did they read it aloud?” asked Stephen.

“No, they did not,” replied Thorndyke.

“Can you prove substitution?” asked Marchmont.

“I haven’t asserted it,” answered Thorndyke. “My position is that the will is a forgery.”

“But it is not,” said Winwood.