No informed person has ever said the siding did not exist just when it did exist.
I am talking about the 30s and 40s, not the 60s. In 1952-3 I experienced several times going to my work in the South East by steam hauled sleeping car over third rail track from Wolseley to Kalangadoo when there was narrow gauge to Beachport and Kingston, and returning a couple of times in a friend's canvas roofed Whippet along a dirt surfaced Princes Highway which wound up and down over the sand hills to and from the Coorong's edge. I took a trip from Millicent to Mount Gambier in the guard's van of a T class hauled goods train one weekend then, and have b&w photos that I took of the isolated stretch of third rail broad/narrow gauge at Tantanoola that predated the broadening to Millicent.
Back in 1934 I left my father's Pontiac car without permission and went to gaze in awe at the many F class suburban engines bustling about the 13 platform Adelaide Station with the Findon (and in the mornings Henley) trams passing by in North Terrace. I was taught a lesson when the car wasn't there when I returned, though of course Dad picked me up before I was reduced to jelly by panic.
Whatever the track diagrams said in the 60s, the watering/coaling spur was at Blackwood in my time. As I have said, I was fascinated by it as a child and teenager and always looked out for it though I only ever passed through the station and I never saw an engine use it – probably because it was useful only to pre-Webb engines.
And SAR 520
, I rode behind the 'Flying Scot' and was behind the 'Duke' when he beat the 'Scot' from a standing start in a parallel run to Salisbury. I remember also riding in a similar contest with the streamlined C38 (our 520s were better) that was the first ever to cross Australia.
In 1945-48 I travelled to and from Port Augusta by an SAR 520 class hauled steel car train with the cafeteria car attached, via a change to the Commonwealth standard gauge at Solomon Town, with T class hauled ore trains running parallel.
Having previously travelled from Sydney by steam to Dubbo, then by the 'Tin Hare' to the NSW station, changing by taxi to the Silverton Tramway station, and then by sleeper through the original Peterborough station and Terowie to Adelaide, I was a passenger on the narrow gauge last train to Hawker, and by sleeper on the last express to and from Broken Hill. I have colour photographs from ARHS trips and a ticket stub for 'Rails to the Summit' somewhere. Then there was being a foundation member of 'Puffing Billy' when it still ran from Fern Tree Gully and many fan trips in Victoria, photographing the last broad gauge 'Spirit of Progress' pass through Footscray behind A class steam, train to Rockhampton with red Beyer Garratts seen in some wayside stations, trams in Melbourne, Footscray, Sydney, Brisbane, Geelong, Ballarat and Bendigo, and a visit to the interchange station at Wallangarra, split down the middle with NSW station building specifications and platform height on one side and the quite different Queensland ones on the other.
I wish that a time machine could allow you those thrills. As I said above, I am glad that I was born when I was and that I am still active, healthy and computer literate in the strangely wonderful and yet impoverished world of today. And after several abortive schemes for installing them since before I was born, I at last have the wires running through my local stations!
My regards to you both,