While I didn't get the impression that Bell laid claim to 'discovering it all', I'd think he is entitled and should lay claim the writings of the tests and results he authored, whether they revealed new data or simply confirmed other's data.

In my opinion he did a great service in revisiting a subject written about and investigated so long ago that it had drifted into obscurity. Having a fresh look at a subject using modern technology stirs reader interest as well as scrutiny by all parties.

Revisiting a subject is a cornerstone of engineering and science I am sure will continue forever and I think it's a very good thing for all.