The vagre is a species of trout. Its head is covered with a hard shell,
its skin is smooth, slippery, and covered with red spots, and its flesh
extremely well tasted. Various rivers contain various kinds of this
fish, which are distinguished by the number, size, and colour of their
fins and gills, but are all of an admirable savour. Of their bladder,
ground with the teeth, and mixed up with brandy, a very strong glue is
made.