There is a typo in [ForgettenSubtree](https://github.com/EspressoSystems/jellyfish/blob/38e6c3c0209c271aa3028892dda0fd39f2acb125/merkle_tree/src/internal.rs#L49), where it should be `ForgottenSubtree`
There is a typo in ForgettenSubtree, where it should be
ForgottenSubtree