What two things did Henry the navigator hope to accomplish by sailing along the coast of Africa?

He wanted to explore and conquer the Atlantic island groups to the west.

He hoped also to catch Islam in a gigantic pincers movement by joining forces with the mythical "Indies"

Henry began to explore the coast of Africa, most of which was unknown to Europeans. His objectives included finding the source of the West African gold trade and the legendary Christian kingdom of Prester John, and stopping the pirate attacks on the Portuguese coast.

In 1787, he was a Pennsylvania delegate to the Constitutional Convention. (The 81-year-old Franklin was the convention's oldest delegate.) At the end of the convention, in September 1787, he urged his fellow delegates to support the heavily debated new document