Let's drive things forward a bit, then.
As the day is getting late, and there seem to be no further leads to be found in Azure District's business establishments, the party decides to take its inquiry to the Azure Watch. In speaking to the sergeant at the Azure Garrison, the group learns that Brissa Santos has indeed been picked up on more than one occasion for acts of petty larceny, mostly pickpocketing or other thefts...but nothing so serious as to cause her to serve time in the jail. Still, the last of these events was months ago, and no one at the Garrison has seen Brissa (or Vanthus for that matter) since then.
With the lead in Azure District coming to a dead end, and the hour now growing late, the frustrated group decides to call it a night, with the agreement to meet the next morning in Shadowshore District, at Chongo's suggestion.
The party hits the local establishments...The Skinned Man, The Narrow House, Fishlip's Games, and The Plucked Parrot. As it turns out, several people they question have seen Vanthus in the area, often in the company of a known smuggler named Penkus. Questions about Penkus reveal that he's a semi-notorious figure in Shadowshore, known for his drunken binges and violent temper. Over the last year, Penkus has been less visible in the district, leading some to believe he's moved on to another venue. However, one old man at the Plucked Parrot recalls having seen Vanthus and Penkus a few weeks back at a boat shop called 'It Still Floats!' where they got in a huge argument with the pessimistic dwarven proprietor, Panchi.