Send a message to the person who requested a photo of the grave monument of David Dundas Whigham with the following comment:
I am doing some research around the person of Walter Kennedy Whigham, son of David Dundas Whigham and Ellen Murray Whigham. I have picked up images of the graves of Walter K. and his son Walter H. elsewhere and the one you are offering of his parents' grave would be much appreciated to add to my record. Thank you in anticipation! I shall be happy to e-mail you back in due course!