London School of Economics Old Building, Clare Market WC2

The Clare Market facade of the LSE's old library was added in 1932 by the architect A.S.G. Butler, best known these days as the author of many books on Lutyen's works. It is decorated by sculpted panels by Edgar Silver Frith, a member of a sculptural dynasty and lecturer at the South London Technical School of Art.
Apparently they represent different modes of thinking, from which we can conclude;
a) Thought hurts;
b) Thought is done exclusively by men.

The Thinking Men are currently obscured by construction so these pictures are provisional.