Appeal to the nobility, clergy, gentry, and merchants of the United Kingdom : on the proposed plan for sending pauper children to Dartmoor prison, contrasted with the measure of converting this extensive building into a penitentiary, for the reception and classification of delinquents of all ages : with a letter to Lord Sidmouth, on this subject, together with some observations on the favourite plans for ameliorating the condition of the poor; particularly on that of employing their leisure hours in the cultivation and preparation of flax /