ETYMOLOGY
adj. & adv.: from French par cœur (by heart, by memory, perfectly, exactly)
vb.: from Latin perquirere (to make diligent search for), formed on per- + quærere (to seek)
EXAMPLE (for vb.)
“…Sweetly disposed soul (for so I hope)
Though most deluded by thy self, and Pope;
Perquire Zoographers, and none recite,
A Romane Pope turn’d willing Anchorite.
Now they so much abhor such doubtful ways,
They’ll not to Heaven go, without false ayes.…”
From: Divine Glimpses of a Maiden Muse
By Christopher Clobery, 1659
Lexicophilia 