From the early 1970s onwards he wrote prolifically for radio and television.

He wrote prolifically, and often favored writing short works in prose.

Although he continued to write prolifically after 1950, Clark published very little.

In the following years, bad health plagued him, though he continued to write prolifically.

He wrote prolifically for Aurora until his death from tuberculosis in 1830.

After that, she wrote prolifically for 40 more years, living and winning prizes in Europe.

Meanwhile, James is writing prolifically himself with little comparable financial or critical success.

During this time he developed his style and wrote prolifically.

He wrote prolifically on science, religion, politics, history and culture, writing nearly 250 books during his life.

Upon his retirement in 1969, he continued to teach worldwide and to write prolifically.