Micar looks around and he finds where most amount of stone has been melted into acrid pools; it was in stored goods section. He finds there is a wooden crate which has been bashed open and bottom of it is a metal jar which had been pried open. The acid had burned stone well but against organic material like wood it has not affected so effectively and so the address which crate came from and where to be send is still seen; Crate came from The Antisolar Institute, a famous local academy in ghetto of scholars which is ran by derro and ilithids who just happen dabble psionics, alchemy and lots other exotic matters. Crate was to be send to other drow city, Lith My'athar to House of Bil-reth'uruth. It may seem someone had broken to the warehouse, and on purpose broken into inside this crate for whatever reason and unleashed whatever was inside it.