“I’m afraid you don’t know my wife,” Belder said. “Once anything instils a suspicion in her mind, it takes days and days and days of explanation to get it out. For a long while, the more you explain the worse it gets. It’s only after long repetition she begins to believe. She’s a terribly suspicious woman. Just a little thing like this would drive her crazy. We won’t be talking about anything else for weeks.”
“Even if Sally leaves?”
“Of course. It’s my guess she’s left already.”
Bertha looked at her watch. “It’s after ten now. Think she’ll get this telephone call?”
“Probably. She told me yesterday afternoon that I could have the car until eleven, that I must have it back to the house promptly at eleven, and to see there was plenty of gas in it.”
“And you want me to do something in connection with this new matter?”
“Yes.”
“What?”
“I want you to trap the person who wrote that letter.”
Bertha’s eyes narrowed. “You want me to get rough?”