system
Context: CHAPTER XVI. THE SUPREME SACRIFICE 

THROUGH the balance of the day and all during the long night Billy Byrne swung along his lonely way, retracing the familiar steps of the journey that had brought Barbara Harding and himself to the little island in the turbulent river. 

Just before dawn he came to the edge of the clearing behind the dwelling of the late Oda Yorimoto. Somewhere within the silent village he was sure that the two prisoners lay. 

During the long march he had thrashed over again and again all that the success of his rash venture would mean to him. Of all those who might conceivably stand between him and the woman he loved--the woman who had just acknowledged that she loved him--these two men were the most to be feared. 

Billy Byrne did not for a moment believe that Anthony Harding would look with favor upon the Grand Avenue mucker as a prospective son-in-law. And then there was Mallory! He was sure that Barbara had loved this man, and now should he be restored to her as from the grave there seemed little doubt but that the old love would be aroused in the girl's breast. The truth of the matter was that Billy Byrne could not conceive the truth of the testimony of his own ears--even now he scarce dared believe that the wonderful Miss Harding loved him--him, the despised mucker! 

But the depth of the man's love for the girl, and the genuineness of his new-found character were proven beyond question by the relentless severity with which he put away every thought of himself and the consequences to him in the matter he had undertaken. 
human
how long did the main character travel?
gpt
THROUGH the balance of the day and all during the long night
human
what is the main character's first name?
gpt
Billy
human
what is his last name?
gpt
Byrne
human
what was his profession?
gpt
Grand Avenue mucker
human
would his prospective father and law care for that profession?
gpt
no
human
who was his prospective father in law?
gpt
Anthony Harding
human
and what is his daughter's name?
gpt
Miss Harding
human
what is her first name?
gpt
Barbara
human
who was the other guy he feared?
gpt
Mallory
human
why is that?
gpt
Barbara had loved this man