The letter from no one

It was nearing five thirty and Mr. Sharma was sitting alone in his dingy cabin, staring at the long accounting logs. It was an hour past the usual office hours and he wasn’t sure what he was waiting for. He had read and reread the logs, double checking every single entry for its legal sanctity. Everything added up and yet there was this unmistakable entry, like a small splinter in your nails that hurts a lot but doesn’t come out. Every month a huge sum of money was credited from a small time vendor that didn’t match with any purchase, sales or tax entry. He cursed his fate for opening the unsolicited envelope he received anonymously. Curiosity had gotten the better of him and curiosity killed the cat! Now he was stuck with these logs and the cursed knowledge of the unknown source of investment, illegal in all probability. He could burn the papers and forget he had received any such letter and live with the forbidden fruit. His pulse quickened at the very thought of covering up. Why