The cause of the time-travel was intriguing. Leinster had obviously got hold of the idea that time was a 4th dimension, and so when it was affected by an earthquake or similar event, it was shifted, not up, down, left or right, but back. Simple as that! The science in such an old story is always going to be dated and off-kilter but if you accept the premise, the scientific incongruences didn't compound further, and it was internally consistent.
This is a touchstone in my SF reading. I can take a fundamental idea or background that is a little out there, and enjoy the story as long is it is internally consistent. On the other hand, once I start noticing contradictions, even in little things, my interest in a story starts to drop off in a real hurry.