Which preposition to use with dour

as Occurrences 3%

For it was big and black as black, and it was dour as dour, It shrank and grew and had no shape of aught I e'er did see.

in Occurrences 1%

Imagine Sir Marmaduke de Chavasse standing there, as stiff a Roundhead as ever upheld my Lord Protector and his Puritanic government in this remote corner of the county of Kent: dour in manner, harsh-featured and hollow-eyed, dressed in dark doublet and breeches wholly void of tags, ribands or buttons.

Which preposition to use with  dour