D'Israeli on the Court of Wards

D'Israeli, in his article upon "Usurers of the Seventeenth Century" (Curios. of Lit. iii. 89. old ed.), which is chiefly upon Hugh Audley, a master of the Court of Wards and Liveries, speaks of that court as "a remarkable institution, on which I purpose to make some researches." Can any of your readers inform me if D'Israeli acted upon this resolve, and, if so, where the results of his labours are to be found?