On April 6th…

Paget illustration of Jack and Effie Munro
Illustration by Sidney Paget for The Strand Magazine (1893)

April 6, 1883: Grant Munro came home early and found the cottage vacant [YELL]

I stayed long enough to make certain that the house was absolutely empty. Then I left it, feeling a weight at my heart such as I had never had before. My wife came out into the hall as I entered my house, but I was too hurt and angry to speak with her, and pushing past her I made my way into my study. She followed me, however, before I could close the door.

`I am sorry that I broke my promise, Jack,’ said she, `but if you knew all the circumstances I am sure you would forgive me.’

`Tell me everything, then,’ said I.

`I cannot, Jack, I cannot!’ she cried.

Source
A Day by Day Chronology of Sherlock Holmes according to Ziesler and Christ by William S Dorn DWNP, BSI.