The sea and commercial expansion that created Infante D. Henriques' myth marked the beginning of slave trafficking. A scenario surrounded by mistakes. There's an idea that persists that Portugal was involved with slavery, but that it could be excusable because they were the first country to abolish it. It so happens that the decree published in 1761 didn't end, as a matter of fact, slave existence. A shadow, amongst many, in Portugal's Great Expansion History.