I found an image of Sir William's heraldic achievements in a reprint of Fox-Davies book on heraldry.If you would like a copy of the scan, please contact me at firstname.lastname@example.org and I will be glad to share.
I came across Sir William's coat of arms while looking for armorial bearings of scientists for an acquaintance who maintains a web site devoted to science.
Just a note:Coats of arms are owned by a single individual and descend via primogeniture; e.g., first son (or daughter if no living sons).Eldest sons may use their father's same arms, but with a "label" attached near the top; younger sons must use a "cadency" mark.One must bear the same last name to qualify (i.e., if your grandmother was descended from Dalby, and your name is Macdonald .... you'd have to legally change your name to Dalby).
Descendants who can trace -- with legal certainty (birth records, proofs, etc.) -- their father to Sir William may petition the College of Arms in London for a differenced matriculation of these arms.Please do not think everyone of the same name "Dalby" may use these arms legally.
The College of Arms charges approximately $5,000 for the entire process, which includes a vellum (calf skin) Letters Patent with wax seals.