Depths of Ignorance

Our guests staying at Fisherman's cabin have often asked us how deep the lake is, and the answer, until recently, was that we had no clue.  So one misty morning, Bob decided it was time to do a depth sounding.  For this we were going to need high tech kit such as rope and a weight.  First, we had to go and buy the rope because, despite being regular purchasers of this item, we never, ever seem to have any.  It just seems to vanish into a void along with socks and teaspoons.  Bob thought 12 metres ought to be enough, and we tied knots at one metre intervals and then attached a hefty weight.  We were then ready to commence the survey.  


Bob was obviously skippering the raft and it was my job to call out the readings.  I had a scrappy piece of graph paper on which to record them in case things got complicated and we set of on our voyage of discovery.  First reading, 10 metres out was 2 metres.  Next reading 20 metres out was 3 metres. 
Bob: "Ah ha!, it's getting deeper"
Next reading: 3 metres, 
Next reading: 3 metres, 
Me: "It's still reading 3 metres, Sir"  
And so on and so forth until we reached the far shore and it went back to 2 metres.  So no great abyss then. It was hardly the Mariana Trench.  We sheepishly disembarked with our 12 metres of knotted rope (which hung around for a while on account of having knots in it but has since disappeared) and now, at least, we know!

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