I am not sure that a letter ever got through. I have e mailed the C/O and the Webmaster from the RCD site but to no avail. There are two photos on the site that could be used. They are out of copyright of course, but if you cannot contact and ask for permission, is it permissible to use them as they are out of copyright and give credit? This mortal man tries to do things by the book and with sensitivity and politeness.
I see that one of your photos Darrell was submitted by someone else to another site and is visible on it. These photos clearly get around!