I just bought the above off E-bay for an amount more than it cost before American Girl retired it. Samantha's Lacy Whites include a petticoat, stockings, and a shirtwaist with garters. The petticoat buttons to the shirtwaist. The garters somehow connect to the stockings, but I still can't figure it out. (Which is why I'm thankful for pantyhose.)
And I'd appreciate any type of clue with the garters!
I am currently attempting to make this with the patterns I have, but the material I chose was thicker than the fine lawn used in the original one. I'm still working on it, but at least I won't have to figure out how to do garters with that one.