You take note of the location, the distinctive slouch of the building and the forgettable scratches that you can not forget (you have similar minor scars on your skin, after all). Perhaps a matter for the thieves to take care of, for later - you have other priorities. The three of you scour the interior of the building on which you stand, and Signore Cestié is delighted to discover a fold of heshen cloth in one corner and a bundle of rough pine wood sticks, scraped of bark to reveal the soft white wood within.

"Ah, here - signal smokers, you see? They are each soaked in certain different chemicals before drying to this indistinguishable state. But you see these notches, here? They mark the colors the smoke they produce will appear when seen through a Tollucini lens. Guillelma Tollucci, you see - Leonardo da Miragliano's sister, who had a little talent of her own. It's through Guillelma that the Cestié family is connected to that family. Here, here..."

He produces his spyglass, and then - for the first time - from inside the lens cap, tugs at a small tongue of leather to reveal a hidden pocket and simple clear circular glass lens, which he presses gently into to wide end of the spyglass with a rewarding click. He hands it to you, and then begins fiddling with the signal smokers, eventually selecting one he thinks his appropriate based on its notches. By that time, Bella has lit a small fire in the defunct brick stove, and Cestié adds a the stick to it.

When you get back to the rooftop, two (and a half) stories above the water level, there is a very mild plume of smoke from the chimney. To the naked eye, it is simple grey woodsmoke. Through the lens affixed to Cestié's spyglass, it is quite clearly intermingled with a ribbon of vibrant green smoke within.

"That should let a spotter know there is someone 'friendly' here to meet. We'll have to convince the spotter to take us to their safe house... or at least to have the local chapter leader come to meet us. For now, err..."

He pivots, looking for somewhere to suggest you and Bella hide... but the rooftop has just the small chimney for cover, which is not at all enough to hide even one person behind. Having all of your out and revealed certainly makes you more threatening - but given that you killed at least one of the Weevers, it might be a good idea for you not to be visible until Maso has a chance to parlay. But that would involve going down the rope to the floor below; which would put you a short climb away from the old tinker should something go wrong. With his crossbow in his hands, he is not harmless - but all the same...

Spoiler: OOC:
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Where do you want you (and Bella) to be as you wait for the Weevers? Out front and proud, or hiding below and sneaky?