PERSON@1 was a prolific correspondent with such leading scientists as PERSON@2 , PERSON@3 , PERSON@4 , PERSON@5 and PERSON@6 -RRB- .

He helped many leading scientists -LRB- such as PERSON@2 , PERSON@3 , PERSON@4 , PERSON@5 and PERSON@6 -RRB- , and many less-notable scientists .
