Henri Carel Beer was the fourth of the six children from the first marriage of Nathan Hermanus Beer (1836-1921) and Clarisse Beer (1846-1879). Henri Carel was born in Amsterdam on 10 June 1875. His mother died just under four years later on 11 April 1879, just after the birth of her sixth child Betje, as a result of “maternity sickness”. Betje, who was born on 8 April, died also after seven days o…