Men of Mathematics

As part of my ongoing investigation into the vagaries and varieties of human genius, I am currently reading E. T. Bell's "Men of Mathematics" (1937) as a counterweight to Bloom's analysis of merely verbal genius.  Bell looks at 33 mathematicians, plus 8 members of the Bernoulli family (which I will discount from any national distribution as being problematical:  are they Swiss or Belgian or Flemish?  Any advice on this question will be appreciated.)