I was going to say those look like septarian nodules, and according to the linked article it turns out that's just what they are - but with a coprolitic surprise inside! Not all coprolites are embedded in concretions like that.
Not Victorian. Georgian.
(According to the article, it was made in 1834).
There was a 'coprolite rush' in Cambridgeshire in the mid 19th century, when it was mined to use as fertiliser- many of the local railways were supposedly built to transport it.
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