The League of Assassins are first referred to in Detective 405 (Nov. 70). I don’t want to say “they” appear, as only one member is in this Denny O’Neil/Bob Brown/Frank Giacoia tale.
A number of shipping tycoons around the world have been murdered, and Commissioner Gordon requests, on behalf of Interpol, that Batman stay near one who is in Gotham. Batman does, and they sail off. The ship gets bombed by dolphins, and they wind up on a island of deadly traps.
All of this is the work of Tejja, of the League of Assassins.
The story does a good job of building the menace of this organization, even though Batman manages to defeat the martial artist.
The story continues in the following issue.
The Batgirl story by Robbins, Kane and Giacoia ends this issue.
The crazy actress who framed Jason does her best to turn Batgirl into a statue in this story, but she fights her way free.
In a nicely ironic touch, the huge head of Billy Warlock has cameras in the eyes, which record the bragging confession of the actress.
I should have mentioned last issue that, with this story, Batgirl’s series becomes the sole back-up feature in Detective.