Which preposition to use with knowledgeable

about Occurrences 1%

On the 6th of November, I was put on the Chennai Express, which was to leave Dadar Railway station at 7 p.m., by my Uncle Alan who is very knowledgeable about trains since he has worked in the railways all his working life.

by Occurrences 1%

" "'A's fully knowledgeable by all accounts; learnt out, they tell me.

in Occurrences 1%

Different from other primitive and negro people, they are very kind to animals, infinitely knowledgeable in the lore of mule and ox, they can be depended upon to exact the most from animal transport with the least cruelty.

Which preposition to use with  knowledgeable