I don't believe your spoon can be attributed to being made by Charles Hendricks of Sydney c.1830. look closely at the hallmarks as it carries the full set of British silver hallmarks
This spoon is known as the Fiddle, Thread & Shell Pattern, looking at the Hallmarks on your spoon from left to right....the silversmith is Charles Hougham, the mark for silver meeting the sterling standard of purity is the Lion Passant, it was Assayed in London (crowned lions head), Capital E dates it to 1800, George III Sovereign head ('duty mark'), certifying the payment of the duty.
Dominant throughout the nineteenth century, Fiddle pattern is the most commonly found pattern from the 1800’s. Originating in France, it first occurred in England from the 1760’s without the shoulders on the stem near the bowl, particularly favoured in Scotland where it is known as Oar pattern. The most common Fiddle pattern variants are Fiddle & Thread and Fiddle, Thread & Shell. The production of plain Fiddle pattern ceased around the time of World War 1.