Question

What did he find in a secret drawer? Who do you think had
put it in there?​

Answer 1

$\large\green{\textbf{\underline{\underline{Here\:is\:your\:Answer :- }}}}$

The author found a shallow space underneath the roll-top desk drawer which was a secret drawer. There was a small black tin box which had a piece of lined notepaper that was sello-taped to its top. There was a note written on it in shaky handwriting: “Jim’s last letter, received January 25, 1915. To be buried with me when the time comes.”

It seems the letter was put inside the box by Mrs. Jim Macpherson along with her full name and address written on the envelope consisting the letter.