next up, mark shriverrer who has written a book about pope francis. becomes being published this week... block. >>> about 20 years ago i was research on my first book about african-american women in the north. and i came across on advertisement for a runaway, anden enslaved person who had run from the president's house in philadelphia. may 1796. and i was sort of caught up looking through mike row film at old knew -- microfilm at old newspapers but this made me pause. i said, who is this person who ran away? she was named one judge in the advertisement. and i thought, wait a minute. i don't know this person. and that was troubling to me. because this is my area of expertise. i'm supposed to know all of this stuff. and i had no idea who this owny judge was and there was something that was very sort of compelling about this advertisement, never sort of escaped me. and i said i'm going to come back to this important story. i'm going to try to trace this woman. i need answers. so i finished the first book and here i am, many years later. it was a lengthy