There is a nice match in Peter Cornwell's recent, enormous and excellent book "The Battle (sic) of France Then and Now" :

Page 25, 1st column, 4th aircraft mentioned (the only one from JG 26 mentioned on this day) : "Engine damaged by ground-fire and wrecked" (destroyed) "in forced-landing at Waalhaven. Pilot believed unhurt."
" (..) may have been May 11 (...)"