![By Sidney Paget (1860 - 1908) (Strand Magazine) [Public domain], via Wikimedia Commons Paget illustratrion of Watson, Holmes, and Holder](https://i0.wp.com/www.johnhwatsonsociety.com/wp-content/uploads/2017/02/Bery-01-300x234.jpeg?resize=257%2C200&ssl=1)

February 19, 1886: Holmes followed the footprints that Arthur Holder and Sir George Burnwell made in the snow. [BERY]

February 19, 1886: Mary Holder eloped with Sir George Burnwell. [BERY]
Source
Information provided from the volume A Day by Day Sherlockian Chronology by William S Dorn DWNP, BSI.
