I love this: A Laura Ingalls Wilder blog.
I was researching Laura recently for the book, and while I thought I knew a lot about her, I didn't realize that of all the four Ingalls girls, Laura was the only one who gave Ma and Pa a grandchild, and she only had one, her daugher, Rose Wilder Lane. Mary never married, and Grace and Carrie did, but did not have children.
And all three generations--Ma, Laura, and Rose--had baby boys who died before the age of one. Sad, sad.