water in light

I met an old man and inventor named Percy.
He no longer moves in this dimension.
Once he smiled with sparkly eyes,
and told me has been designing an
inter-dimensional communication device.
He said that it used a pyramid that
focused cosmic rays, and at its base,
he placed droplets of mercury.
He said, the inter-dimensional beings
can move mercury through a type of 'thought' power and as such, it can be used as medium of communication...
These water droplets reminded me of Percy, of Mercury, and
of inter-dimensional communication...