 Complete the following phrase:  Graham Hill was retained for the following seasons, but Tony Brooks, although only 29 three years younger than Hill retired from Formula One, disillusioned with the 1.5 litre cars and with a new motor dealership to run. His replacement was Richie Ginther, a 30 year old American coming off a promising year with Ferrari. The season began with Hill taking a well-deserved first victory at the 