Eva sends Thanksgiving greetings to the Farmer sisters. She's hoping that Will will marry one of them. She's got Kathleen's name wrong, but all that really matters to her is that the Farmers are Christian Scientists.
Greetings and best wishes for a happy Thanksgiving Day to you and your mother. And not to their father? I guess Eva never saw WJ at church.
I'm sure that, devout Christian Scientists that they were, Ruth and Kathleen enjoyed getting a picture of the Philadelphia branch.
I wondered if that church was still in use today, and found that it was sold in 1995 and is now The Rotunda of The University of Pennsylvania's Foundation Community Arts Initiative.
But in 1915 the church was still pretty new; the foundation stone was laid in 1909. It looks like quite an impressive building for a relatively young religion.
Side note: I wonder how enthusiastically the Farmers, from England, celebrated Thanksgiving, an American holiday.