  21 cm HI line observations were made with the Arecibo Gregorian telescope of
9 HI clouds in the Hercules Cluster which were reported as tenative detections
in a VLA HI study of the cluster (Dickey 1997) and for which our deep CCD
imaging failed to find any optical counterparts. No sensitive observations
could be made of one of these (sw-174) due to the presence of a close-by strong
continuum source. The other 8 tentative HI detections were not reconfirmed by
the Arecibo HI measurements. The CCD images did reveal faint, low surface
brightness counterparts near the centres of two other VLA HI sources invisible
on the Palomar Sky Survey, sw-103 and sw-194.
