The work progressed, many churches were planted. Many Hindu people received Jesus Christ as their savior and took baptism. Among these, one Hindu blacksmith received baptism known as Paulose, from Thrikkannamangal. At his residence he started a Bible study class and later it was shifted to Mulakuzha in 1926 and now it is known as Mount Zion Bible Seminary. During this time Kalloor John Chacko ( grand father of the author) and his eldest son Thomas laid up with typhoid disease and Cook went to their house and prayed for them and God healed them. This was the turning point of them to be the believers of Pentecostal doctrine from Brethren church. In 1928, Kalloor Thomas and other six families joined together and purchased four cents of land nearby and constructed a hall for worship and the worship of Cook from the temporary shed was shifted to this hall. This is one of the first Pentecostal Church in Kerala, established by Cook. The Pastors of the church in different period were Cook, Charles Cummins, K.C. Chandy, A.R.T. Athisayam and M.K.Varghese. This has been continued till 1942 and division took place, one group remained at Malankara church and another group under the leadership of Cook bought land at the present place and constructed prayer hall, where full Gospel Church of God is functioning at present. In 1936 Cook joined with full Gospel Church of God Cleveland in America. Many of his co-workers parted with him and formed their own Churches like I.P.C and Ceylon Pentecost Mission.
