I think Dickens is using instinct as an adjective here:

ADJECTIVE: (n-stngkt)1. Deeply filled or imbued: words instinct with love. 2. Obsolete Impelled from within.
(From the AHD http://www.bartleby.com/61/0/I0170000.html

Sense 1 seems to fit the bill.

Bingley


Bingley