On April 7th…

Illustration by Sidney Paget for the Strand Magazine[
April 7, 1883: Grant Munro and Sherlock Holmes discovered who was behind the Yellow Face. [YELL]

It was a long two minutes before Grant Munro broke the silence, and when his answer came it was one of which I love to think. He lifted the little child, kissed her, and then, still carrying her, he held his other hand out to his wife and turned towards the door. “We can talk it over more comfortably at home,” said he. “I am not a very good man, Effie, but I think that I am a better one than you have given me credit for being.”

 

April 7, 1890: Violet Hunter consulted Sherlock Homes. [COPP]

Illustration by Josef Friedrich[

As he spoke the door opened, and a young lady entered the room. She was plainly but neatly dressed, with a bright, quick face, freckled like a plover’s egg, and with the brisk manner of a woman who has had her own way to make in the world.

“You will excuse my troubling you, I am sure,” said she, as my companion rose to greet her; “but I have had a very strange experience, and as I have no parents or relations of any sort from whom I could ask advice, I thought that perhaps you would be kind enough to tell me what I should do.”

“Pray take a seat, Miss Hunter. I shall be happy to do anything that I can to serve you.”

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