Silver hallmarks

Hi, Greetings from the States. I have a lovely mug in my posession with the following hallmarks on it. Could you please let me know what they mean?

Hi Debbie,
The marks show that your mug was made by James Dixon and Sons (the J. D. & S mark), in sheffield (the crown mark), in 1870 (the date letter C). The lion passant is the sterling silver mark, which means that the mug has been tested for purity and found to be 92.5 % pure (the legal standard for silver production in England). The last mark is Queen Victoria’s head, a mark that was used to show that duty was paid on the mug when it was made. This duty on silver was removed in 1890.

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I hope this helps.