Hudson (All-Consuming Fire)
From Tardis Wiki, the free Doctor Who reference
Mrs Hudson was the housekeeper of Sherlock Holmes and John Watson. In 1887, she served the Seventh Doctor tea and Madeira cake at Holmes' residence. (NA: All-Consuming Fire)
A Mrs Hudson, who may or may not have been the same individual, was Professor George Litefoot's housekeeper in 1889. She regularly left him a "cold collation" for late dinners. (DW: The Talons of Weng-Chiang)