Solution:

Basel Evangelical Missionary Society (BEM) or Basel Mission is a Christian missionary society active from 1815 to 2001

Rev. Dr. Hermann Gundert was a German missionary who belonged to BEM.

Gundert compiled a Malayalam grammar book, Malayalabhaasha Vyakaranam (1859).

He worked primarily at Thalassery on the Malabar coast, in Kerala.

Paathamala(1860) Believed to be the First textbook in Malayalam.

Kerala pazhama(1868) includes 33 years of Keralite history, from Vasco da Gama’s arrival in 1498 to 1531

Malayalarajyam(1879) Geography of Kerala
Rajyasamacharam (1847 June)
Paschimodayam (1847 October)

LMS- London Missionary Society
CMS-Church Mission Society