Original: According to the book The Disney Villain, written by Johnston and Frank Thomas, Johnston also partnered with Thomas on creating characters such as Ichabod Crane (in The Adventures of Ichabod and Mr. Toad) and Sir Hiss (in Robin Hood).
Simplified: The book The Disney Villain, written by Johnston and Frank Thomas, says that Johnston also worked with Thomas on making characters such as Ichabod Crane (in The Adventures of Ichabod and Mr. Toad) and Sir Hiss (in Robin Hood).