"What letter?" asked Arthur.
"Oh, I forgot! It was after you had left that Mr. Brading received a letter by the evening post from Lady Mary Murray, asking about an order she had sent to me a week before, and adding that the receipt had not been sent for the money she enclosed. I have never seen the letter. I was coming up to you this morning about it."
"I have always been very careful to deliver all the letters I get," said Arthur.
"Oh, yes! We are all satisfied with the way we get our morning letters now. I was only speaking of it to Mr. Brading the other day."
"Well, I will have a hunt upstairs, and see if it has fallen down anywhere, but I am pretty sharp to see if one does fall, and I pick it up at once."
"Well, look through your desk and drawers as soon as you can, and I hope you will find it."
Arthur went up to sort the letters for that morning, and looked in his desk at once, in the hope of being able to tell Mr. Langley that he had found it, when he went down with the bag. But he was scarcely surprised that he did not see anything of it, for if it had been handy, he would have seen it before. And so he went his round and resolved to make a thorough search when he got back.
"There is a letter missing," he said to Mr. Bristow, after he had wished that gentleman "Good-morning."
"Ah! I was just going to tell you the same thing," said the accountant. "You would have heard about it last night, if you had not been in such a hurry to get away. Mr. Brading and I were locking up when a letter was brought from Lady Mary Murray."
"Yes, and won't there be a fuss if we can't find that letter she sent a week ago!" laughed Arthur. "Mr. Langley has told me all about it. She'll turn the post office upside down."