Trenches, some of them, are created by the erosion of rivers, and a river is probably what G_K is sailing on right now in his boat, though do you think he has pinstripe boat shoes to go with it and a Captains Hat, aye aye Captain

Captain is the name given to the master of a vessel (ship, boat...) or plane.

Plane and simple, oh I think that is the wrong spelling.

Spelling is important, but it is in decline, mainly due to spell-checkers and text-talk.

Text_talk cn b qt annoying, tryn 2 rd it whn drunk is hrd

"Hrd" is not to be found in the Oxford English Dictionary.

Dictionary is a book I regularly look at.

At times, it can be particulary useful.
Especially when you want to know the meaning of a word such as polysemy.

Polysemy, I must look that up in the dictionary.

Dictionary may be required to find out the meaning of polysemy.

Polysemy seems to be word of the moment.

Moment (noun) was originally defined as being a minute and a half.

Half a pint is never enough.

Enough of this nonsense! One bite would kill you if you ate an Amanita phalloides.

Phalloides is not in my dictionary so I don't know the definition.

Definition of aforementioned word would be found in a dictionary of fungi (if you search with the full name). It is more commonly known as a death cap.

Cap, like a cloth cap, such as typifies someone from Yorkshire ?

Yorkshire? I think of Heartbeat!

Heartbeat is filmed in North Yorkshire, the village of Gothland is the main area.

Area can also refer to the 18 yard box in football.