Question about an English phrase

Hi all of you!

In this episode of the wonderful wizard of Oz
http://tinyurl.com/yfxsuue

I read :

“I always did like flowers,” said the Lion. “They of seem so helpless and frail. But there are none in the forest so bright as these.”

What is the difference between :

“They of seem so helpless and frail”
and
“They seem so helpless and frail”

Could you give me other sentences with such a use of "of "?
Is it often employed in English?

I can’t actually open the URL… I’m not sure why.

But I can tell you that “They [of] seem so helpless…” is completely incorrect.

Perhaps “of” should in fact be “oft”?

I’ve never seen the word “of” used in that context. I would ignore it, it’s probably just a typo.

Yup it’s definitely a typo but it’s fixed now. Good work for spotting it MissTake

Thanks. It was surprising for me never having encountering such an expression. I thought about a typo. But the reader also says the “of”.