Jenkin first joined first class Welsh team Swansea in 1893, and in the winter of the 1895 season he was selected to represent Wales as part of the Home Nations Championship.
Jenkin was brought into the pack for the last game of the tournament against Ireland, and was one of two new Welsh caps on the day, with Llanelli's David Morgan chosen for the first time at half-back.
Under the captaincy of Welsh rugby legend Arthur 'Monkey' Gould, Wales were looking at the unwanted title of Wooden spoon after losing their first two games of the Championship to England and Scotland.
Played at the Cardiff Arms Park, Wales won by a narrow margin thanks to a converted try from Tom Pearson.
The pack was almost identical to the previous match, with the only change seeing Treorchy's Sam Ramsey replacing the experienced but aging Jim Hannan.