The castle was built in Bridgwater to show off the potential of concrete, but fell into disrepair.
A Taunton councillor says the money was spent on consultants working on a regeneration scheme.
The one-month-old grey seal pup also had several bite wounds when it was discovered on Weymouth Beach.
It includes the names of every British and Commonwealth serviceman and woman lost in the war.
Team news as Bath host Worcester Warriors in Saturday's Premiership fixture at The Rec (12:45 GMT).
Bath players Anthony Watson, Charlie Ewels, Nathan Catt and Elliott Stooke all agree long-term contract extensions.
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