How many storeys does this tower house have which David Gregory inherited in 1664?
David Gregory (physician) David Gregory (20 December 1625 – 1720) was a Scottish physician and inventor. His surname is sometimes spelt as Gregorie, the original Scottish spelling. He inherited Kinnairdy Castle in 1664. Three of his twenty-nine children became mathematics professors. He is credited with inventing a military cannon that Isaac Newton described as "being destructive to the human species". Copies and details of the model no longer exist. Gregory's use of a barometer to predict farming-related weather conditions led him to be accused of witchcraft by Presbyterian ministers from Aberdeen, although he was never convicted.
Keith Marischal Keith Marischal is a Scottish Baronial Country house lying in the parish of Humbie, East Lothian, Scotland. The original building was an "L-shaped" Tower house, built long before 1589 when it was extended into a "U-shaped" courtyard house. The building acquired its modern appearance in the 19th century, when the courtyard was filled in. The house is protected as a category B listed building.