Don (and the others). These are two very interesting pictures, both taken from my copy of "The isle of Man TT - An illustrated history 1907-80", Matthew Freudenberg, Aston Publications Limited, 1990:

[1]
http://img236.imageshack.us/img236/7940/...9102ld.jpg

This a picture that portrays the exit of Ballacraine during the 1910 TT races. As you know this was the last year in which it was used the St. John's course - so Ballacraine bend was a left hand corner few miles after the start in St.John (the course was anticlockwise). The wooden banking was placed to allow the rider to not finish in the drainage channell at the exit of the bend, in their attempt to not lose speed for the _rise_ to Ballaspur. At the end of the straight it's easy to see the _hump_ that in more recent years and with more powerful machines required a rider's jump.

[2] http://img236.imageshack.us/img236/756/b...9127gm.jpg

This picture portrays the terrible jump at Ballig bridge during the wet 1912 Senior TT race. Yes, it was really a spectacular place. But for the spectators, not for the riders!

Hope that these pictures may interest you.