Is this Walter Raleigh’s 'lost colony' drawn in invisible ink? Clue to 400-year-old mystery discovered in map of North America
More than 100 settlers landed off the coast of North America in the 1580s to set up England's first-ever colony. But the expedition ended in mysterious circumstances when they disappeared without a trace. Now experts believe they may be a step closer to solving the riddle after finding the possible location of the settlement in an Elizabethan map (top and bottom left). The marking was written in lemon juice or urine, often used as invisible ink and revealed itself in recent scientific tests. Queen Elizabeth I and famed explorer Sir Walter Raleigh (right) had hoped the expedition would create a capital in the New World.