I am aware of Unicodes and ascii codes, and that the symbol I needed was ALT+0146 or Unicode U+2019
I spent a miserable hour trying to work out how to do this in Inkscape, I eventually found a clunky workaround.

There must surely be a better way? In particular, how and where do I enter the code? Above I had to create some text, select it, find the glyphs dialogue, select a different charset wthin the font, find in the tiny preview the precise symbol, paste it (append) and then jiggle about in the text box.
Here is the first effort, I have not actually redone it with the correct apostrophe!
