Morten Kiil.

[Resting his hands and chin on the top of his stick and blinking slyly at the Doctor.] What was it again? Wasn’t it that some animals had got into the water-pipes?

Dr. Stockmann.

Yes; infusorial animals.

Morten Kiil.

And any number of these animals had got in, Petra said—whole swarms of them.

Dr. Stockmann.

Certainly; hundreds of thousands.

Morten Kiil.

But no one can see them—isn’t that it?