1603 J. Florio tr. M. de Montaigne ii. xvii. 376 The more..subtle-brained [L. callidior] a man is, the more is he hated.
1844 J. Mills xix. 116 The way of obtaining admittance therein no mortal, however philosophical and subtle-brained, could or will unriddle or devise.
1912 E. Curtis 456 The iron-handed, subtle-brained Guiscard is there.