How do I include an image from resources in my TWebBrowser page in Delphi?

Microsoft explains the res protocol, and shows the following example:

#define MYBITMAP 234 "res://mydll.dll/#2/#234"

where #234 is the string or numerical identifier of the resource. #2 is the resource type. Resource Types lists the defined types, and we see that #2 corresponds to RT_BITMAP. Didn't work, but changing #2 to #10 (for RT_RCDATA) solved it. So the following HTML code does the job:

<img src="res://Circles.exe/#10/rc_geraldine" alt="" />