They don't end up getting it to Haven until the next day, when Savil Gates over to retrieve it and then very, very cautiously opens it. In one of the Work Rooms.
It does not explode or prove to contain poison or traps.
"It says that he's received the demonstration and is impressed. He wants to offer some sort of concrete, bounded help, both because he directly wants to help anyone working on something like this, and as a demonstration for us. Ideally it would be something he can leave in a specified location and we could retrieve later and check for magical traps and all that. He's not sure what would be helpful, but - magical artifacts, materials, scholarly works, anything like that we can think of that wouldn't require a face to face conversation. He suggests we reply by leaving our own message or just wait for the dream with Vanyel."