From the (updated) App we know that 1. Pyat Pree and three warlock companions have been captured by the Silence before Euron returned to Pyke. Before that, we only had his claim that he captured some warlocks, although the fact that he has and drinks Shade of the Evening was always a strong sign. 2. Euron captured Dragonbinder along with the warlocks; it was on their ship, possibly in the possession of the warlocks since battle/war between Valyria and Qarth that the Qartheen won, m