This article contains lore created collaboratively by the Blaseball community. It is just one of many Historical Rumors that we've found in the Interdimensional Rumor Mill. You can find more Historical Rumors about Fitzgerald Wanderlust at their Historical Rumor Registry.
Marginalia in a lesser known illuminated text from the priory at Lindisfarne, dated to the early 800s CE, reference a "Fitz Gerald Wanderer", apparently a figure in Irish folklore who is said to have had a unique ability to communicate with the aos sí. The illuminator in question appears to have been expressing frustration with the Abbot of Lindisfarne's disapproval at their attempts to Christianize the figure as someone who preached to various traditional mythological creatures in Ireland.