Adam Blake Jr. is one of the most extraordinary entrepreneurial success stories of 19th-century Albany — a man whose rags-to-riches rise is often likened to a Horatio Alger tale. He built the landmark Kenmore Hotel on North Pearl Street, owned a string of restaurants and hotels, hobnobbed with governors and when he died in 1881 had a net worth estimated at more than $10 million in today’s dollars.