Which preposition to use with hearn

of Occurrences 10%

Like enough he's hearn of that silver mine, and that's the reason he's after Johnnie.

on Occurrences 5%

She fell to once into highstericks, and he, when he recovered conscientiousness threatened to lick the man, and everybody in St. Louis, and made the air blue with conversation that the Realm of Love never ort to hearn on, and wouldn't probable for years and years if it hadn't been for this contrary temps.

about Occurrences 1%

She said they had a real House of Parliament and you could drive in jaunting cars through Lake Kilarney region and the rocky road to Dublin that we've all hearn about.

to Occurrences 1%

Mebby he'd hearn to me and mebby not, men are so sot in their way.

Which preposition to use with  hearn