Gentlemen,
Your obedient servant,
Edwin Chadwick.
APPENDIX.
1.—Evidence of Mr. John Roe, Civil Engineer, on the Practical Improvement in Sewerage and Drainage tried in the Holborn and Finsbury Divisions of the Metropolis.
You are the surveyor to the Holborn and Finsbury Commission of Sewers?—Yes, I am.
By profession you are an engineer?—Yes; I have been engaged as an engineer in the formation of canals and railways, and in the drainage incident to such works.
How long have you acted as surveyor to this branch of sewerage in the metropolis?—Nearly four years.
Have you observed the general state of the sewerage of the metropolis?—I have only seen some of the sewers of other divisions, but I am generally acquainted with the principle of their construction.
Is it generally the same as that in which you found the sewers in the Holborn and Finsbury divisions?—Yes, except that the forms differ in a degree; some are flat-bottomed sewers, others segment-bottomed. For a long time the Holborn and Finsbury divisions have used bottoms of a semicircular form.