_The Evening Post_, 19 March 1925:
SLIP ON RIMUTAKA HILL ROAD
(BY TELEGRAPH—PRESS ASSOCIATION.)
MASTERTON, 19th March.
The #Rimutaka Hill road was blocked an at 2.30 this afternoon through a slip coming down where a Public Works gang was widening the road. One car, with the assistance of ropes, got round the edge of the slip this evening, but it is doubtful if heavy traffic will get through until to-morrow night or possibly later. It is expected that the obstruction will not be removed for 48 hours.
https://paperspast.natlib.govt.nz/newspapers/EP19250319.2.117