I read, obsessively and repeatedly, the animal stories of Ernest Thompson Seton. Some were first published in 1890's, some as late as the 1920's. They are full of blood and thunder and would probably not be considered children's stories today, except for the fact that they're about animals and have pictures.
How do you establish what is a 19th century children's book? Literature just for children is a phenomenon that appeared fairly late in the 19th century. Seton's animal stories were for people of all ages. As were any number of other things that now (probably because people remember the titles but not the content from their own childhoods) are considered 'children's literature.' Huckleberry Finn, say. James Fenimore Cooper's Leatherstocking Tales series are 18th century works but spring brightly to mind because they keep getting printed as 'for young readers.' Yet if Cooper wrote those today and published them under that sort of cover he'd be peeled, salted and driven through the streets by soccer moms with spiked planks. And I keep seeing Moby Dick in the toy section of Wal-Mart, with a garish cover that calls it a 'children's illustrated classic.' That's odd. I wish it was Billy Budd.