Shortly after Aiwass left the Lohar Building, Lily quietly alerted him that someone was following them.
Even though "Spider's Silk Sensing" enhanced perceptual abilities, Lily was only at the first energy level. If someone was determined to follow them secretly, it would be quite difficult for her to detect them at this moment.
In other words, this was essentially "overt surveillance," an attitude expressed by Vice Chairman Boka towards Aiwass:
"Our Lohar Society is large and powerful, yet we only sent a tail that you could detect to follow you, suggesting that our current attitude is friendly."
It also implied that they didn't fully trust Aiwass and there might always be spies that they couldn't detect tailing them—telling him that since there are always eyes watching in the dark... he'd be wise to stay calm and not stir up trouble.
But Aiwass discerned another piece of intelligence from this act: The Lohar Society was currently under political pressure.