Lambertus Arnoldus Vlemmings was a former soldier and after his demobilization by the Germans in 1940 parcel deliveryman at Van Gend & Loos. At the beginning of the war, he distributed underground magazines and leaflets printed by vicar Hennekens from Valkenburg.
From the spring of 1941, the Smit group also focused on intelligence gathering and the acquisition and purchase of weapons, ammunition and explosives. Smit entrusted this task to L. Vlemmings. 
Arrested on 02 February 1942, sentenced to 12 years in prison, died in Dachau on 23 February 1945. 
His last resting place is unknown, the OGS (Dutch war graves foundation) assumes in a letter to his mother that he “rests nameless in the midst of many unknown comrades in fate at the International Cemetery Leitenberg in Dachau”. 
He is listed in the “Erelijst 1940-1945” (Honor Roll of the Dutch Parliament).