**ICE**

[GravelTeeth]

Just thought of something.

This pipe is running uphill parallel to and looks like within the property lines of lot 18. We know John Smith bought this lot in 1795 and.built a house on the island in 1824? presumably on his own property. So if this line existed in 1824 and Truro found the finger drains in 1850....

If it was exclusively grey water, such an outflow might work. With the filter system in place, however, any ... uh ... solids would just build up at the exit point until nothing could flow through anymore.

Also, presumably Anthony Vaughan (Jr.) would have had some knowledge of his homie's construction of such an elaborate sewerage, and he was still alive (according to my quick perusal of sources) in 1850 to have consulted on the matter. He was a member of Truro, even.

I like where your head is at, though. Keep thinking outside the box (drains).

--GT

 

[GravelTeeth]

Let's suppose it is a man-made chamber with treasure and Rick and Marty drop a can right on top of it all the way to bedrock to hold the water back.

Is there a way to get down there and preserve the treasure or do you think they'll just hammer grab it to the surface?

Unfortunately, the so-called "solution channel" is below bedrock already, and grows as the water erodes away the anhydrite. It's an open question how deep they'd have to sink the lined shaft before they got to "solid" with no further fissures or caverns undermining it. Significantly further than what they've done before, though. I think I read where the anhydrite eventually gives way to a different type of bedrock (something more impervious to water) at some depth.

--GT