For those who, like my young buddy Angela, et.al., have been fortunate enough to read "Three Men in a Boat," here's a web site with pictures along the upper Thames.
In the forward of my copy of the book, there's an account of three men who decided to recreate the epic c. 1880 journey. As they were stowing their gear in their boat, a crusty, ill-dressed, old river man watched their progress, and as they neared completion, he yelled, "Don't forget your tin opener!"
Angela will understand this. The rest of you will have to read the book.