The Journals of Sparrowhawk
A captive aboard the Mary Anne. Tried for kidnapping two children and the possible murder of others. Protests his innocence. Due for incarcaration upon a prison ship near Dunghill Island but released by Red Avanti and now lives upon the Crimson Maiden.
Was found guilty in Hallowfield after being caught with one of the children.
His hut had a lab in the basement with many shapechanged fey creatures trapped in jars. The most powerful was a Fey Prince of the Unseelie who called lightning and insect swarms as thanks for his release.