Yeah, that must have happened countless times to people back then I would think. When I think back, I am pretty sure most of my escapes were from other stupid mistakes I made, like forgetting to put the bricks back on at ALL!. Or have the lid off waiting for a snake to eat undisturbed, only to get side-tracked doing something else while waiting, and come back later and glance over to see a VERY empty cage..LOL!
Since those days, I have had very minimal escapes, because I knew very early on that the escaping abilities of a snake cannot be underestimated by ANY cercumstances whatsoever. If a lid is even slightly questionable, it ain't good enough at all, and the snake will be eventually end up gone.
even in the past 20 years or so, with many countless hundreds of snakes, I have only had maybe three or 4 snakes escape, and that was because I left the lid off while they were feeding, and accidentally got doing something else that got me side-tracked.....ARRGH!
In about 1995, I had a big male "sunglow" cornsnake out casually cruising in my backyard while I cleaned my pool, and I inadvertently ran inside because of a phone call. Well, several hours later, I walked into the snake room to discover the snake's lid off of it's cage!!!,...my stupidity hit me like a freakin ton of bricks of what I just allowed to happen. Anyway, I searched the entire back yard up and down to no avail. that beautiful big solid orange amel was GONE FOREVER!
~Doug

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"a snake in the grass is a GOOD thing" 
my website -serpentinespecialties.webs.com