When you look at the transcript it is hard to say it could be Tidbury, however there is no dot above the letter. Unlike in Havill there is a definite i.
Kathy
Yes, it makes it hard to tell sometines. Even comparing other words on the page doesn't always help. A little dot can be hard to see too, and may not have survived the digitisation process - especially the greyscale scans that we are generally used to seeing with some of these images.
For what it is worth, Google says that Tidbury is a far more common word than Tedbury. Also i think the fact that Tidbury calls himself as such points to that being the correct spelling.

Having said that, i thought that i would throw in something else that i have found.
Although not strictly related to the original posters question about what happened to T H Edwards, i think it does serve to show that handwriting can be hard to decipher if nothing else. It may even be helpful .

The 1891 UK census shows (according to the machine readable transcription) one
Thomas Tedbury Havill, aged 71, as residing at 40 Lower Budleigh(street?), East Budleigh, Devon, England. Also residing there is Clarissa, aged 72, Thomas' wife.
The scan of that census page is pretty clear but you still can not say for sure that the word handwritten there is not Tidbury. For instance, there is a Catherine a couple of lines down on the same page, and there is definitely
no dot above the i in Catherine. There are probably other examples on the page but i don't need to list them to illustrate my point.
I am editing this post to add a couple of interesting links about the above Havill(they all think it is spelled Tedbury

):
http://www.geoffnutting.me.uk/havilltree/havillfam.htmhttp://www.btinternet.com/~keymer.recording/tree4/tomted.htmBack to the subject though - perhaps cando is right and T H Edwards is still alive. Maybe in Canada?
Regards