Those who are willing to be vulnerable move among mysteries.
I’m in the same city as Leo Dicaprio…jesus take the wheel
You know how Mycroft said brotherly compassion? The way that scene is worded makes me wonder if the third Holmes sibling was a girl? Sherlock overlooked the fact that Harry is female so perhaps he forgets that he has one as well(a sister), or maybe he isn’t aware of her prescence. In HLV we see from her book that his mum’s name is not Violet. Assuming Siger had an affair early on while Sherlock was still little I think it’d be funny if the girls name was Violet Sherridan Vernet Hunter. Because who would want a bastard child named after you, why not be subtle and refer to your actual wife’s lineage. Perhaps Mycroft and Sherlock knew her as Sherridan. Violet Hunter was canon her initials would still be holmesian. I just wonder what it was that Mycroft did, perhaps he told his father to forget her after Sherlock revealed his infidelity which in turn upset mummy. Maybe up until that point Violet had been welcome in their home as a faux cousin, maybe she was good to Sherlock and influenced him. Maybe they continued to corrospond till he was in uni maybe she had something to do with Sherlock hating Mycrofts interference. I’m just shooting ideas but if you’ve got a theory I’d love to hear it!