[Leendert]

Christian (and Alain),

Answer is in the Feb 45 reports of the 242nd Medical Detachment on the 381st BG website:

9 February – Captain Cronin led 37 aircraft which took off at 09.30 hrs the destination being Arnsberg, Germany. A railroad bridge was bombed from 22,000 ft, at minus 40 degrees, by GH, blind and unobserved. GH reported an excellent bomb run. Flak was meager and inaccurate, although some was encounter on the way home over the Zuider Zee. No fighters were encountered and there were no casualties.
One ship did not return, Lt Williamson, but it was later learned that he crash-landed in France and there was one injured, but the individual is unknown at the present time.

It appears that Lt Williamson flew with 535th BS.

Regards,

Leendert