Chetty:
I'm not sure of the time period you're referring to here.
But here's my experience on the little j with them.
I used to fish to a very sparse hatch of them on the espy farm section in the mid 80's.
Then the hatch seemed to explode on the river in the early 90's, and provided some fantastic fishing.
But they disppeared - along with all the other hatches - after the chemical spill in '95.
I quite fishing the river for about 5 years after that, then heard that the hatches were returning at the turn of the decade.
I started fishing the river again in 2000, - and saw just a couple of them hatching then - in the upper part of the gorge.
I figured that they probably worked back down into the river from spruce creek.
Now, I really haven' been looking for them lately. But apparently they've returned again?