In 1898 Henrik Koestler met Adele, married her in 1900, and set up household in Budapest, where on 5 September 1905, Arthur, their only child, was born.
Henrik Koestler met Adele, married her in 1900, and set up household in Budapest, where on 5 September 1905, Arthur was born. This was in 1898. Arthur was their only child.