I was reading aCoS when I found Moridin apparence described by Mogghy:

(pg 532, Mindtrap)-"You can look now",a deep voice said.(Point1) She did, cautiously. The speaker was a tall, broad-shouldered young man(P 2) in black boots and breeches and a flowing white shirt unlaced at the top who whatched her with startlingly blueeyes...-

(pg 533, Mindtrap)-Suddenly it occurred to her that this fellow knew a great deal for a Friend of the Dark, especially one not many years past twenty.-(P 3)

(pg 534, Mindtrap)-She knew that some men who could channel survived in this time aside from al'Thor--this fellow was much the size with al'Thor(P 4)--but...- And then I remembered havig seen the Wanderer described by Rand: (pg 846, A Crown of Swords)- A hand grabbed his right wrist. "You are a fool" a man's deep voice said.-(P A)

( pg 846, A Crown of Swords)- His head and shoulders came above the floor and he could see the other man, a big fellow (PB) little older than he(P C), with hair black as the night and a coat black as an Asha'man's.-

(pg 847, A Crown of Swords)-The other man pushed himself up with a grimace at Rand's proferred hand. He was easily as tall as Rand (P D), rare except among the Aiel.-

They are identical, and the wanderer attitude towards Rand is very, very similar to Ishy's attitude. For example he knows Sammael way of thinking (pg 848), and more important he said this sentence:

(pg 848, A Crown of Swords)-"You may find the way, it seems.If you're led by the hand. Tray not to stumble. A great many plans will have to be relaid if you let yourself be killed now".-

This is pure Ishamael, to me. Then why was he in Shaddar Logoth?Two possible answers:

He was spying on Rand, being Ishy that is quite probable.

He was spying on Sammael, and if the wanderer is the watcher, as the black flecks in his eyes and his speech seem to prove that would explain many things: he knows about Grendal attitudes

(pg 453, Patterns whitin Patterns)- Graendal's real interest was always the most beautiful plucked from among the most powerfull, but she would have flirted, just to pass an hour,with a man she intended to kill...The only men she nver flirted with were those of the Chosen who stood above her for a time. She never accepted being lesser of any pair.-

And again he said a prhase:

(pg 454, Pattens within Patterns)-But today 's truth need not to be tomorrow's. The watcher had seen truth change a hundred times between a single sunrise and sunset. More than once he has changed it himself.-

This is Ishy, again. And:

(pg 453, Patterns whitin Patterns)- Over the years he had learned expertise in many areas Sammael scorned. In some he favored, too.-
We know only one Forsaken that has had the time to expertise in many areas " over the years". Ishamael!!

I hope to have it right (but still I don't understand how and why Ishy escaped imprisonment, if someone could explain it to me I would be grateful.).