The blog "Shady Characters" has a lot of great investigation about the history of the Octothorpe[1], and similarly the Pilcrow[2], Ampersand[3], and "commercial

The blog "Shady Characters" has a lot of great investigation about the history of the Octothorpe[1], and similarly the Pilcrow[2], Ampersand[3], and "commercial at"[4]. [1]: http://www.shadycharacters.co.uk/2011/05/the-octothorpe-part-1-of-2/ http://www.shadycharacters.co.uk/2011/05/the-octothorpe-part... [2]: http://www.shadycharacters.co.uk/2011/02/the-pilcrow-part-1/ http://www.shadycharacters.co.uk/2011/02/the-pilcrow-part-1/ [3]: http://www.shadycharacters.co.uk/2011/06/the-ampersand-part-1-of-2/ http://www.shadycharacters.co.uk/2011/06/the-ampersand-part-... [4]: http://www.shadycharacters.co.uk/2011/07/the-symbol-part-1-of-2/ http://www.shadycharacters.co.uk/2011/07/the-symbol-part-1-o...