Really? That could have been the evening you were spending time under the Jetty & your mind was elsewhere perchance?.
A sinking Sema4 would have been handy for my old Gramps when the end of his Jetty Kiosk/Ballroom was on fire & lost completely. No kid.
One wonders what the heat source was but now it seems a bit clearer. No mention of a sighting of Steam though.[bigrolf]
11 Mar 1947 - Semaphore Jetty Kiosk Badly Damaged By Fire - Trove
That'd be the time when I remember Gramps coming to live with us at Torrensville. I recall he was a Herd Tester & brought all his big books & some equipment with him to clutter up the joint.

