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He studied at St. Andrews University, and developed an interest in arithmetic there.
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He studied in multiple countries in Europe, such as France, Italy, and the Netherlands. He went back to Scotland in 1571.
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He married Elizabeth Stirling
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He inherited his father's properties and a castle was built on it in Gartness.
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His first wife, Elizabeth Stirling, died.
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A few years after his first wife's death, he married Agnes Chisholm and had a large family
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He published “A Plaine Discovery of the Whole Revelation of St. John”. He also started working on logarithms.
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He moved back to Merchiston Castle, following his father's death
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He invented logarithms.
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He died at the age of 67.