Because KCS has strange dreams, and then she has to go and share one with me ;)
Had I known the course of events that would stem from attending the conference held by Professor George Challenger's exploration team once they returned from Brazil, I may have simply refused to accompany Holmes to the afore-mentioned conference.
As it was, I attended that fateful exhibit and thus was party to all that followed. That is why I found myself – several weeks later – face to face with a young and all-too-curious Tyrannosaurus Rex with both my rifle and service revolver some twenty feet away.
"Actually, Watson," Holmes corrected, observing the creature with professional interest, "I believe that is an Allosaurus."