Bonanza S05E08 - Journey Remembered

Ben finds Hoss in the barn waiting for a mare to give birth. Ben can't help but remember that's how Hoss' mother (Inger) was. He then finds an old journal wherein he wrote down their trek West. While Hoss waits, Ben reads it and recalls how their trek was arduous. And Inger was pregnant with Hoss and they had to deal with Indians and a drunken wagon master.