How early was this sacrificial system known?

Answer

"By faith Abel offered unto God a more excellent sacrifice than Cain, by which he obtained witness that he
was righteous, God testifying of his gifts." Heb. 11: 4. See Gen. 4: 3-5; 8: 20.

When purged from these sins, in what condition is a man, and for what is he prepared?
Whose example are we urged to imitate?
In what other way do some dishonor their father and mother?
What did God do in the beginning on the seventh day?
What shout of triumph was heard in heaven following the victory gained by Christ?
3. According to the prophecy, how long was the power represented by the little horn, or papal Rome, to persecute the saints?
In what one promise are all these promises summed up?

Questions & Answers are from the book Bible Readings for the Home Circle