One was too quiet. The other was too outgoing.
One followed procedure. The other listened to office gossip.
One believed that science was important. The other believed that scientists could be cute.

One was determined to be somebody, to make a difference, to do something big.
The other was determined to be her friend.
The improbable story of Gertrude Blanch, Ida Rhodes and the great information factory that was called The Mathematical Tables Project.