The intelligent-looking man seated in the second row made a slight gesture. ‘Exactly,’ Alleyn said and enlarged upon it to the class.

‘I’m able,’ he went on, ‘to give you a pretty full account of this apparently blameless little cruise because my wife wrote at some length about it. In her first letter she told me—’

I

‘And there you are.’ Troy wrote. ‘All done on the spur of the moment and I think I’m going to be glad I saw that notice in The Pleasure Craft Company’s office window.

‘It’s always been you that writes in cabins and on trains and in hotel bedrooms and me that sits at the receiving end and now here we are, both at it. The only thing I mind is not getting your letters for the next five days. I’ll post this at Ramsdyke Lock and with a bit of luck it should reach you in New York when I’m at Longminster on the turning point of my little journey. At that rate it’ll travel about two thousand times as fast as I do so whar’s your relativity, noo? I’m writing it on my knee from a deck chair. I can’t tell you how oddly time behaves on The River, how fantastically remote we are from the country that lies so close on either hand. There go the cars and lorries, streaking along main arteries and over bridges and there are the sound-breakers belching away overhead but they belong to another world. Truly.

‘Our world is watery: details of eddies and reeds and wet banks. Beyond it things move in a very rum and baffling kind of way. You know how hopeless I am about direction. Well, what goes on over there beyond our banks, completely flummuckses me. There’s a group of vast power-houses that has spent the greater part of the afternoon slowly moving from one half of our world to the other. They retire over our horizon on the port side and just as one thinks that’s the last of them: there they are moving in on the starboard. Sometimes we approach them and sometimes we retreat and at one dramatic phase we sailed close-by and there were Lilliputians half-way up one of them, being busy. Yes: OK darling, I know rivers wind.