On January 7th…

January 7, 1886: Milverton sent an incriminating note to the husband of one of his blackmailees. [CHAS]

January 7, 1888: Holmes received an encoded message from Porlock. [VALL]

January 7, 1903: James Dodd left Old Tuxbury for London, where he consulted Sherlock Holmes. [BLAN]