Sentence:  He also played the piano and violin, was an <WSD>ambidextrous</WSD> artist, and enjoyed  acting. Holidays were spent yachting or canoeing or with his brothers. By 1903,  Baden-Powell's military training manual, Aids to Scouting, had become a best-seller,... 
Meaning of the word marked with <WSD> tags:  Exceptionally skillful; adept in more than one medium, genre, style, etc.