1913 CMS approached by Dr Arthur of Kikuyu to allow CSM to take over missionary responsibility for the Chuka-Mwimbi area (September)
1915 Mweria chosen as site of Mission by Dr Stanley Jones (October)
1916 African evangelists arrive at Mweria: David Mukumi from Kikuyu abd Samaon Maingi from Tumutumu (March)
1922 Dr Arthur and Ernest Carr decide to move Mission to Chogoria in Chief Mbogoli’s location (February). Prefabricated bungalow taken to Chogoria from Nairobi (March). Dr & Mrs. Irvine arrive at Chogoria (October).
1924 Baptism at Chogoria of first eighteen Mwimbi Christians by Dr Arthur (September 28th)
1926 The Revd. Jeremiah Waita arrives at Chogoria as first African minister (March). First permanent (brick) hospital building opened with two words and ancillary rooms (March). Small leprosarium built at Gatheru. New testament published in Kikuyu Language.
1927 Coffee first planted at Chogoria by Dr Irvine. First Christian marriage celebrated (December)
1929 Female circumcision controversy reaches Chogoria with signing of the Chogoria promise (September)
1930 Completion and dedication of new brick Church building at Chogoria (January 17th). Robert Macpherison arrives (August). The Chogoria Woman’s Guild formed First number of the Annual Chogoria booklet produced by Dr Irvine,
1943 Ordination of the Revd Joseph Gathogs at Chogoria and his induction as parish minister at Chogoria (January 3rd)