The paper discusses rainfall and run-off in storm-water sewers, aiming to gather and expand on previous discussions on the topic. The researchers suggest a more logical solution method, although the experimental data provided are not entirely conclusive. Early observations from London in 1854 by Roe, Bidder, and Bazalgette are highlighted as influential in the engineering field. The hope is that this paper will encourage further experiments and the submission of additional data for comparison.