Greatly daring, she even visited Yucatan and saw some of the pre-Aztec remains.

For this adventure she paid with an attack of fever which never quite left her system.

Indeed, that fever had a peculiar effect upon her, which may have been physical or something else.

Isobel's fault, or rather characteristic, as the reader may have gathered, was that she built too much upon the material side of things.

What she saw, what she knew, what her body told her, what the recorded experience of the world taught--these were real; all the rest, to her, was phantasy or imagination.