Read the excerpt from "Opening Ceremonies of the New York and Brooklyn Bridge" by Hon. Seth Low, Mayor of the City of Brooklyn. In the course of the construction of the Bridge a number of lives have been lost. Does it not sometimes seem as though every work of enduring value, in the material as in the moral world, must needs be purchased at the cost of human life? Let us recall with kindness at this hour the work of those who labored here faithfully unto the death, no less than of that great army of men who have wrought, year in and year out, to execute the great design. Let us give our meed of praise to-day to the humblest workman who has here done his duty well, no less than to the great engineer who told him what to do.

The content of this excerpt makes it clear that

the audience was not very grateful to those who built the bridge.
the mayor owned the company that built the Brooklyn Bridge.
the building of the bridge was incredibly difficult and dangerous work.
the finished bridge was not worth the high cost of construction.