It's a font that was used in original mary poppins book cover illustrated by Mary Shepard. Picture I used - https://i.pinimg.com/originals/b3/b8/26/b3b8265b03ea663c8fba696f4c735805.jpg
Our system helps everyday thousands of designers (famous or not) to find the fonts they need to complete their work. Using a database of 990,000 fonts the automatic font finder system identifies the font from images.
Yet sometimes the images are very complex, so other users need a bit of help.
If you recognize the font from the samples posted here don't be shy and help a fellow designer.
If you need help, first try the font finder. At the end of the process if the results are bad you will find a link that lets you post the image to the forum so other users can help you.