Whitcombe was found dead in his office desk .Sherlock narrowed the suspects down to 3 people Mrs. Barbara Whitcombe, Ray's wife, Mr. Jason McCubbins, Ray's Business partner, Mr. Harold Nichols, Ray's best friend. Sherlock found a torn picture of his wife laying on the floor beside the trash can, and a ink pen in his hand. On the desk, the police found a name plate, a telephone that was off the hook, personal calender turned to July with 7891011 written on it. after examining this evidence, Sherlock knew the suspect. How??