The Summer, 1984 edition of "Switchback" (Volume 10, No. 3) featured an article dealing with the reminisces of Mrs. A. Montague and Mrs. J.Chadwick, former residents of the (Wolgan) valley.

Zig Zag Archives has in its possession two copies of the "New South Wales Railway Budget":, described as "an organ devoted to the interests of the Railway and Tramway Services" Volume XIX, No. 222 dated February 1, 1911 featured the following item :

For the first time a Pullman railway car found its way into the Wolgan Valley, occupied by delegates to the Australian Congress for the Advancement of Science, for whose entertainment and instruction Mr. Henry Deane, of the Commonwealth Oil Corporation, had arranged a trip to the works of the Commonwealth Oil Corporation at Newnes.

The Corporation's railway into the valley had been much talked and written about as a feat of engineering skill, and as exemplifying the use, for the first time in New South Wales experience of the Shay principle in locomotion. But when its permanent way was being cut along the sides of the precipitous cliffs or through the bluffs which could not in some way be got round, it was not contemplated that Pullman traffic should be provided for. So the taking of the car through was something of an experiment. The real question of difficulty arose at the tunnels.

When going through the first one met with the passage of the train was watched with a little apprehension. The height of the excavation was found to be only just sufficient to clear the roof of the carriage, and the curve was barely full enough to permit its length to swing round without bumping an end against the side. But the contact was not heavy. A little of the paint was scraped away; otherwise there was no damage.