The reason why this task came up is that I got a question concerning Edgar’s Corner and a sidecar crash on the TT Course in the 1959 TT races.
 
I soon remembered that the sidecar race 1959 took place on the Clypse Course. A map of that course showed a bend named Edge’s Corner on Johnny Watterson’s Lane between Ballanard Road and Cronk-ny-Mona. It’s easy to get the name Edgar’s wrong.
 
On several sites on the net I found that Edge’s Corner is the first corner on the TT Course to get a name from a rider. That happened 1920.
 
I asked for more information about Mr. Edge and here it is!
In May 1905 Cecil Edge driving a Napier motor car was engaged in a morning practice session for the forthcoming motor car race and whilst in the process of overtaking another car he crashed into the hedge at full speed. The front of his car was buried three feet into the earth bank. Neither he nor his passenger sustained injury. It would seem that from that point the bend was known as Edge’s Hedge or Edge’s Corner. 
 
The reason why he wasn’t in the database for the TT is that he was a driver and not a rider!
 
Racing at St John’s Corse stopped 1910. For some years in the beginning of the TT Course, 1911 – 1920 (there was no racing 1915 – 1919 because of the First World War) the bikes turned right after Hillberry and went on south on Johnny Watterson's Lane passing Edges Corner. Please note in the opposite direction compared to the Clypse Course. The racing direction on Clypse Course was north on Johnny Watterson’s Lane.
 
Later on from 1920 the competitors turned left at Cronk-Ny-Mona and followed Mountain Road to Governor's Bridge with a new start/finish line on Glencrutchery Road. As it is today. Conclusion it is correct to say that Edges Corner for some years was a part of the Mountain Course or as I always call it, The TT Course.