No, the original mountain circuit was slightly different from now. I'm not sure where from exactly, I'm trying to remember but my brain is useless, sorry. I think the bikes turned off at Cronk ny Mona? Certainly there was no Governor's Dip. The course as we know it now (aside from straightening Quarry Bends, Brandish, etc.) was put in place in 1914.

I'm sure someone else more knowledgeable/intelligent than me will be along to correct me and add proper info! Sorry, I spend so much time with 3 year olds that much of this information has been relegated to make room for more nursery rhymes!