1. George Eliot, Aldous Huxley, Jack London, Sir Arthur Sullivan.
2. Decimal, Effect, Hints, Primal, Steamer, Tunnel.
3. February 19th, March 10th, June 21st, August 15th, November 14th.
No.1 On the other other hand it could be Jack London as he is American and the others are English.
That,s three perfectly logical answers and there probably are more.
A pathetic quiz in my humble opinion.Don't know why I waste my time.