The Age of Exploration: Chapter 3, Exercise 3 — Possible Solution
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WHAT IT DIVIDED
Newly discovered lands outside Europe between Portugal and Castile, along a
meridian 370 leagues west of the Cape Verde islands: east to Portugal, west to
Castile.

WHY THE UNCERTAINTY
The treaty gave distance in undefined leagues from unspecified Cape Verde
islands, without degrees, and 16th century experts proposed locations from
about 42 to 49 degrees west.

CAUTION
The source does not mention the peoples who already lived in those lands.