Edinburgh maker IR c1825

[Combe]

Are any helpful forum members able to offer an identification for an Edinburgh Silversmith using the initials "IR", working in the year 1825?

Many thanks, in advance.

[Granmaa]

Jackson's silver and gold marks lists the names John Robb and James Redpath (p.563) as working in Edinburgh around this time. However, I can't find a picture of their marks I'm afraid.

Miles

[Combe]

Thank you Miles; that is most helpful. It did occur to me that the "I" could be an archaic spelling of "J".