Stranger than takes Emma to the wishing well to drink water with magic to FIND WHAT IS LOST…. thus setting her up to find the book and maybe try and get Emma to believe in magic. There seems to be some of the age old conflict between the two that have developed in people over time…. those who believe in faith / magic / powers beyond what we can see and those who believe in logic, science and only what can be discovered by our senses.
That is very interesting.
Here’s another thought: What is lost to Emma? Her parents. What if the water helps her realize what she has always since meeting Henry, that MM & David are her parents. They were never lost to her but she needed something to make her see that they were in front of her the whole time.