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.

What replies does Inspiration return to these inquiries?
2. What attitude of rivalry was the Papacy, represented by the little horn, to assume toward the Most High?
Under what threatened penalty is the worship of the image of the beast enforced?
What were the colour and character of the fourth symbol?
What scene in heaven was presented to the prophet as the seventh trumpet was about to sound?
Does God always see fit to grant our petitions?
What relation do all sustain to God?

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