I wonder if Alan Alexander pronounced this as 'theezles' or 'teezles'?

Well, Frank Luther sang it as "theezles," and since Milne has alreay used up the "tea" sound in warning us not to teasle a sneezle or wheezle I suspect he meant it to be a real th, not a Germanic one...anyone around from Britian who might know the range of pronunciation? (Darn, where's that Henry Higgins when you need him?)