On November 13th 1915 Celtic were defeated 2-0 by Heart of Midlothian at Tynecastle. The following week they beat Kilmarnock 2-0 at Celtic Park. This was the beginning of a 62 match unbeaten run.
So, the story of this remarkable run begins and ends with Kilmarnock:
CELTIC BEATEN AT LAST
The Glasgow Herald 23.04.17