BATMAN (1940) #139

This Silver Age adventure features the very first appearance of Batgirl! « The Blue Bowman » Batman and Robin go up against the Signalman in a new costume and now calling himself Blue Bowman. The duo discover that while in prison, the Signalman met Bulls-Eye, a criminal who adopted Green Arrow’s trick arrow motif but altered it slightly by committing crimes instead of stopping them. Inspired, Signalman followed suit and decided to adopt the persona of Blue Bowman. The Caped Crusader tries to bring the Blue Bowman to justice but is thwarted by the trick arrows again and again until Batman adopts a counter measure; trick batarangs! Blue Bowman is quickly defeated and returns to jail.…