The knife looks very much like an Ontario Knife 5125SS 4" Seed Potato Knife, although it could be a 5115SS 4" Vegetable Knife.

I have a 5125SS in my general mechanic/household toolbox; it is a most useful tool. Never tried it on a potato.

there was no mother around, just a father and the three kids. Hope everything turned out well for them. Was a single dad myself for a number of years.

This little girl doesn't look like she's more than about twelve, but she looks like she's all ready been keeping house for quite a few years. I wonder if her mother had passed away and she, being the oldest daughter, was required to take over the housekeeping and cooking. I'll bet she did more work in a day than most kids now do in a month. I hope things improved for her family and she had a good life.

I also wonder about that knife she is using to pare potatoes. It looks like the tip is square. I can't recall seeing one like that before.

What a difference. In the first photo I commented that in spite of the apparent desperation the children were smiling. Here this young lady, in what I imagine to be, her best dress, appears not only happy but allows Mr Rothstein to be at his best.

I assume that was provided by the camp?
I can't see them lugging that monstrous thing across county in the back of old Bessie!