Herman Samuel Cohen, the sixth child of Hartog Cohen and Marianne Sitters, was born on 26 June 1913 in Leiden and became a teacher for “education at independant schools”. Except his school diploma of the 5-year HBS, he succeeded too in obtaining his headmasters certificate. He arrived from Leiden in Amsterdam in 1935, where he shortly stayed at Boerhaaveplein, went back that same year to Leiden t…