There is no headstone for the members of the family you posted. George and Fredericka have grave markers. Frederika's marker has been shortened to "Fred" as you will see. I did include a picture of Charles and Louisa headstone beliveing them to be related.
I will scan and email the Office Card that has additional valuable information. The quick shots taken with my Ipad will be followed by shots taken with my digital camera.
I hope this helps.