While at Berlin in1824-1825he was thrown into prison, either on some ill-defined political charge at the instance of the French police, or on account of certain incautious expressions which he had let fall in conversation.

incautious remarks.

But at the same time many of the shortcomings of oology in this respect must be set down to the defective information and observation of its votaries, among whom some have been very lax, not to say incautious, in not ascertaining on due evidence the parentage of their specimens, and the author next to be named is open to this charge.

And yet here again incautious advance may seem to overleap itself.