First Dual-code Rugby International
England's Anthony Starks and Wales' Jack Rhapps took the field in the inaugural rugby league international of 5 April 1904 between England and Other Nationalities Starks had made two rugby union Test appearances for England in 1896, and Rhapps had made a single rugby union Test appearance for Wales in 1897, and thus in April 1904 they became the world's first dual rugby code internationals.
The first tour matches played by the New Zealand All Golds in Britain in Nov & Dec 1907 would have seen international cross-code debuts by some of the seven touring former All Blacks. At this stage of the tour the New Zealanders were still familiarising themselves with the new Northern Union rules which they had not seen until they arrived in Leeds in October. The first full international of the tour against Wales on New Year's Day 1908 saw confirmed appearances by Mackrell, Turtill, Wrigley, Johnston & Cross for New Zealand and David Jones for Wales. Thus New Zealand's first five dual-code rugby internationals all achieved that feat in the same match.
Read more about this topic: List Of Dual-code Rugby Internationals