The great animal painter and later sculptor of the lions in Trafalgar Square, Sir Edwin Landseer, with whom Dickens had been on very friendly terms since about 1840, had evidently urged Dickens to draw attention to the inadequacy of the living space provided for the lion and lioness from Mozambique and South Africa that were among the animals at this time housed in the Carnivore Terrace (built 1843 and surmounted by a walkway) at Regent's Park.
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