What was good about Bill was that whenever he wrote a plot, he did a lot of research for it. Whether the setting was a railroad station or a factory, he would find a photo reference, usually from National Geographic, and give Bob all the research to draw from. He was very orderly and methodical. His only problem was that he couldn't sustain the work… he couldn't produce material regularly enough
There were other Batman writers throughout the years but they could never capture the style and flavor of Bill's scripts. Bill was the best writer in the business and it seemed that he was destined to write Batman".
…[Bob Kane] had an idea for a character called "Batman", and he'd like me to see the drawings. I went over to Kane's, and he had drawn a character who looked very much like Superman with kind of … reddish tights, I believe, with boots … no gloves, no gauntlets … with a small domino mask, swinging on a rope. He had two stiff wings that were sticking out, looking like bat wings. And under it was a big sign … BATMAN.