Dr Henry Stephens was at medical school with John Keats, but later (in 1832) invented his famous 'Blue-Black Writing Fluid', which he developed into writing ink. It was in about 1834 that he began ...

Dr Henry Stephens was at medical school with John Keats, but later (in 1832) invented his famous 'Blue-Black Writing Fluid', which he developed into writing ink. It was in about 1834 that he began ...