Does anyone know about image copyright for Nursery Rhymes?

It depends totally upon the image. Do you have specific ones in mind? See if they are copyrighted and who golds the mark.

the images are usually provided by the publisher of the book, and the dates/copywrites vary. Check the dates on the work you want to use.

A new, original illustration of a traditional nursery rhyme—say, Little Bo Peep—would belong to the illustrator or to whoever paid for the work. The verses and concepts of the old rhymes themselves are in the public domain.

You need to look up who the illustrator is/was and if they or the publisher still own the work. There are a few really old ones from the 20’s or so that are now public, but it completely depends on on the images themselves. If the publisher of the book still exists, I’d give them a call or drop them an email. It has nothing at all to do with the age of the book, generally speaking because if the creator is dead, the rights can be bought or transferred.