Barsirian Arap Manyei (born c. 1894 – 10 April 1974) was the last widely recognized Nandi Orkoiyot and Kenya's longest serving political detainee.
[citation needed] By 1923, when the saget ap eito (sacrifice of the ox) was to take place, these factors had been contributing to a buildup of antagonism and unrest toward the government for three years.
The historically significant ceremony where leadership of the community was transferred between generations had always been followed by an increased rate of cattle raiding as the now formally recognized warrior age-set sought to prove its prowess.
[citation needed] Alarmed at the prospect, the colonial government came to believe that Barsirian was planning to use the occasion of the Saget ab eito as a cover under which to gather forces for a massive military uprising.
On 16 October 1923, several days before the scheduled date for the saget ap eito, Barsirian Arap Manyei and four other elders were arrested and deported to Meru.
It is recorded for instance that on 25 November 1970, William Morogo Arap Saina, a Kenyan Member of Parliament asked in that body, what action the Government would take to help Barsirian "whose age was approaching 90 years, and who had a large family who were all squatters".