9. The slopes being honey-combed and disturbed by rodents, particularly in clay soils, clay marls, and clay loams; and upon submerged earthwork, and in certain districts in the tropics by a mollusk which will penetrate and even destroy rocks.
10. From one portion of a cutting being more exposed than another to disintegrating meteorological influences.
11. By the discharge of water from land drains following the old drainage course, and by the localisation of the surface or land water flow.
12. The improper or imperfect drainage of land outside a railway fence, causing land water to accumulate in and discharge itself through the slope, thus disturbing the established equilibrium.
13. By an interference with the natural flow of any underground waters.
14. By allowing water to accumulate in the gullet, or upon the formation during the process of the excavation of a cutting.
15. The local percolation of water through the slopes of a cutting from the defective construction, wrong location, or permeability of the surface of a drain upon the cess.
16. An accumulation of water caused by the unevenness of the slopes.
17. The acceleration and inducement of a flow through the slope of any water contained in land outside a railway fence, and consequent incitement to the land-water to exude.
18. Vibration.