He amassed a large fortune in Ireland, in which country he had been allotted lands by Cromwell.
Besides the civil list the duke of Saxe-Coburg-Gotha enjoys a very large private fortune, amassed chiefly by Ernest I., who sold the principality of Lichtenberg, which the congress of Vienna had bestowed upon him in recognition of his services in 1813, to Prussia for a large sum of money.
A few years later, Leber retired (1839), and sold to the library of Rouen the rich collection of books which he had amassed during thirty years of research.
The wealth he amassed from the Congo he spent, no doubt, royally not only in this way but also on public improvements in Belgium; but he had a hard heart towards the natives of his distant possession.
Neither the immense fortunes amassed by these men, nor the venality and robust vitality which made their families veritable races of ministers, altered the fact that De Lionne, Le Tellier, Louvois and Colbert were in themselves of no account, even though the parts they played were much more important than Louis XIV.