If you are talking about Bruce Berndt, Bruce did not rederive Ramanujan's results alone; he has a big network of collaborators and students who have worked with

If you are talking about Bruce Berndt, Bruce did not rederive Ramanujan's results alone; he has a big network of collaborators and students who have worked with him, and of course many independent researchers have derived some of his formulas. His books contain all the relevant attributions and history (I talked with him extensively and got some of his classes when I was a phd student in UIUC).