On April 28th…

April 28, 1882: Major Sholto died (SIGN)

April 28, 1891: Holmes and Watson arrived in Geneva (FINA)

April 28, 1898: Holmes received a note from Violet Smith saying she was leaving her job (SOLI)

April 28, 1902: Lady Beatrice Falder died in Shoscombe Old Place (SHOS)