Victorian!Holmes crossover with Jeeves/Wooster

[wonapalei.livejournal.com]

I have vague memories of a story crossing over one of the Victorian Holmes/Watson 'verses with Jeeves/Wooster, wherein Jeeves is somehow related to (son? cousin?) Holmes and/or Watson; they actually raised him, I believe. He is acting as a secret government agent sort of thing, and ends up falling in love with Bertie. Holmes is rather WTF? about it because Bertie, is, well, not of the same intellectual caliber, to put it diplomatically. Watson reassures him that whatever else Bertie is, he's an honest, good-hearted man who obviously adores their son/cousin/nephew/whatever.

Does anyone remember this?