Sunday 8th December 2024, in Boom the stumbling stone was placed for August Elsen. In the presence of Patrick Elsen, second cousin of August and Tjen Mampaey, author of several books and articles about the resistance movement "De zwarte Hand". Music by Oscar Bohnen.

August Elsen was born on 8 July 1923 in Boom. During the Second World War August had joined the resistance movement "De Zwarte Hand" and was arrested for his resistance activities on 27 October 1941. After his arrest he was first locked up in Fort Breendonk and transferred the same day to the prison of Sint-Gillis. On 25 June 1942 he was deported to Wuppertal. From there to Esterwegen and on 30 October 1944 he arrived at the KZ Gross-Rosen where he had to perform forced labour until the camp was evacuated on 8 February 1945. The exact date of death is unknown, but it is known that he probably died in April 1945 in the Boelcke Barracks in Nordhausen.