The letters ranged from 1963 to 1982, thus covering some of the author's most creative and prolific years.

His most prolific year was in 2000 when he made 960 runs at 38.40.

Its most prolific years were the 1970s, having recorded 10 albums.

His most prolific year was 1972, during which time he wrote and starred in no less than seven movies!

The 1940s were prolific years for Graham, and he published four more books during that decade.

His most prolific year came in 1959 when he managed 2090 runs.

His most prolific year to date was 2009, with 47 books published across three different series.

About 300 were killed in the most prolific year, 1952.

His most prolific year came in 1979, when he made 1,222 runs at a batting average of 42.13.

His most prolific year came in 1938 when he won three tournaments on the British circuit.