@Paradox
I had also not heard of Leslie Flint. But I did a bit of research and I am not impressed.
First of all, he’s dead. Therefore, there’s absolutely no way to go back and test his supposed “powers.”
Second of all, the “testing” that was done on him doesn’t seem to resemble standard double-blind testing like we would use today. However, it’s difficult to judge this accurately because the results of the tests aren’t published.
The above-cited webpage makes some very good points-
“1) Every single one of the speakers on the audio files has an English accent. Even Bessie, the stereotypical cotton picker from Alabama. Her accent fluctuates from a lame attempt at an American south accent to British cockney to Scottish. Listen (it will come on automatically) to her recording and see if you don’t agree.
2) Chopin speaks perfect English. He was Polish, and ostensibly only visited England a few times.
3)The speakers all have the same basic speech pattern, with little to no deviation between them. They all talk about the same stuff, about how wonderful it is on “their side.” They all use the same terminology, no matter what time period or part of the world. Also, the English of 18th Century England is very different from the English of the 20th century, which is something that obviously has slipped Elizabeth Fry’s mind. ”
It’s also been pointed out that his supposed “Gandhi” sounded nothing like Gandhi and that much of the testing was done in the dark because light would have a destructive effect on ectoplasm.
As far as the experiments you mention:
First of all, it doesn’t look like most of the experiments focused on whether he was accurately conveying “voices of the dead,” but on how he was doing it. This is a matter of physiology, not spirituality, and any talented ventriloquist might be able to do the same things.
As far as I can determine, Sir Oliver Lodge didn’t do any experiments on Flint; he was supposedly “channeled” by him.
Sir William Crookes died when Flint was 8. Again, Flint only “channeled” him.
The “Scole experiment” was debunked very well by Brian Dunning.:
“Unfortunately, the Scole Experiment was tainted by profound investigative failings. In short, the investigators imposed little or no controls or restrictions upon the mediums, and at the same time, agreed to all of the restrictions imposed by the mediums. The mediums were in control of the seances, not the investigators. What the Scole Report authors describe as a scientific investigation of the phenomena, was in fact (by any reasonable interpretation of the scientific method) hampered by a set of rules which explicitly prevented any scientific investigation of the phenomena.”
As far as I can tell, they also didn’t look at Leslie Flint.
So none of your three sources give any credence to any ideas that Flint was anything other than a very talented ventriloquist.