Question

They held the baby up to the window for last good bye--- 'Sayonara'; and then the monotonous doggerel rhythm of the train, quickening to a roar, drowned all noise. we were off.It was good bye for us too, as we rushed through Japan on our way to the boat.
Q What expression monotonous doggerel rhythm mean?

Answer 1

It means the irritating rhythmic sound of the train