They had first met in 1903, and later maintained a correspondence throughout the war.

He also began to maintain a weekly correspondence with his mother.

The two poets maintained a correspondence over a long period, from 1946-1979.

The two would maintain correspondence until Carlyle's death in 1881.

He maintained correspondence on these topics with major scholars in China.

Associations were formed in different parts of the country and they maintained correspondence with each other.

She's maintained a regular correspondence with the older brother; she must have known they were coming over.

This friendship continued after war's end, and these two men maintained a friendly correspondence for many years.

He also maintained a vast correspondence with leading biologists of his time.

He also maintained an extensive correspondence with scholars and politicians.