SIR,--The plan of your Correspondent, "A DOUBTFUL SAILOR," who alleges that he avoids sea-sickness by drinking two bottles of Champagne before starting, and then goes on board accompanied by his Family Doctor, who administers alternately nitrous oxide gas and ginger beer to him every ten minutes till the passage is over, though no doubt an efficacious preventive, strikes me as less simple than the means I invariably employ to secure a comfortable crossing. They are easily available, and are as follows. Before I start I provide myself with a six-foot mattrass, several yards of rope, and four screw-hooks, which, the moment I enter the cabin, I proceed with a large gimlet to fasten to the ceiling, and, before the Steward or passengers have had time to protest, I have rigged myself up a capital swinging bed in the very centre of the vessel. To jump in, occupy it, and keep officials at bay with an umbrella, only needs a little nerve and practice, and when once fairly out of port, specially if it be rough, one is not very easily dislodged. In the course of thirteen passages, I have only been overturned eleven times, in nine of which I was cut down by order of the Captain; and though on several occasions, through clinging to the swinging-lamp, I brought it down in the struggle, and had to pay for the damage, I can confidently recommend any one who has a horror of the Channel crossing, and does not mind a brisk physical encounter with three Stewards, the First Mate, and half the crew of one of the Folkestone and Boulogne boats, to follow my example. I am, Sir, your obedient servant, ABAFT THE FUNNEL.