The railroad tracks are leased to the Great Western Railway Company, and the contract requires that the bridge should be inspected and examined by the Government engineer of the provinces of Canada, the Hon. H. H. Killaly.

The following is the certificate of that officer, addressed to the respective companies:

DEPARTMENT OF PUBLIC WORKS.

Quebec, 31st April, 1855.

Sirs,-I had the honour a short time since to receive a letter from Mr. Roebling, requesting I would name a day on which I would meet him for the purpose of inspecting and testing the Niagara Suspension Bridge. I have also had a communication from the Managing Director of the Great Western Railway Company to the same purport.

Having had repeated opportunities during the course of its construction of judging of and observing the careful and scientific attention given to it in all its details-the selection of the best of materials, of their respective kinds, used in it, and the severe tests to which it has been already subjected-I do not require any further proof to satisfy me of its stability and sufficiency for the purposes for which it is designed; nor do I conceive it necessary to require the engineer again to go through the ceremony of testing it.

The respective examinations I have made of it, from time to time, the trials it has undergone, the ingenious and talented calculations made of its strength, &c., by Mr. Roebling, to which I have had access, convince me fully, that with due care in the maintenance of it, it will be found a safe and permanent work, the principles, plan, and details of construction of which reflect the highest professional honour on that gentleman.

I am, Sir, your obedient Servant,

To the President and Directors of the Niagara

Suspension Bridge Companies.