We are satisfied upon the evidence in the record that there was an obstruction in the canal, inside the buried rock, which was known to exist by those conversant with the condition of the channel, and which ought to have been known to those in charge of the tug. In towing the libelant’s canal boat upon an obstacle which competent and experienced pilots would have avoided, the tug was guilty of negligence.

The decree is affirmed, with interest and costs.