Reply to Maria Miranda Thank you for your e mail Maria. The details about Manuel Johnson's thesis are interesting The date of the publication of the thesis seems strange - 1883. If he was born in 1869 he would have been only 14 which seems a bit young?? Also that he became a professor at Havanae university etc and was inducted on 22 August 1884 - he would have been only 15? This is strange don't you think?