Plainly+with+an+intelligence+I+dealt

What is it to be "plainly with intelligence"?
The writer is refering to the speck's intelligence in this statement. He has, in some way, given the speck some kind of power by giving him some form of intellect. There is no telling of the way the writer felt that he "dealt" this intelligence unless this all happening within his mind. The speck is starting to evolve into something more then what was there on his page before by posessing these other forms of intellect.