What is it and what put it there??

[Jack Bounder]

The pictures I posted above are both slime moulds.

Clicky

Clicky

But yes, I think I agree that the thing which was found isn't a slime mould.

 

[Robson Valley]

JB, Thank you very much. Learned a couple of new things from your post pix.
I was expecting the slime mold to aggregate to form a grex, a thing that I have watched and studied.