Private investigators 74 Fiction 68 Privatization 57 Private schools 49 History 30 Private collections 18 Finance 16 Holmes, Sherlock (Fictitious character) 12 Detective and mystery stories, English 11 Crook, Arthur (Fictitious character) 10 Art collections 9 Government business enterprises 9 Private libraries 9 Government ownership 8 Private presses 8 Congresses 7 Economic policy 7 Education 7 Private companies 7 Privateering 7 Art 6 Economic aspects 6 Government policy 6 Hefferman, Hooky (Fictitious character) 6 Biography 5 Catalogs 5 Deregulation 5 Education and state 5 Exhibitions 5 Federal aid to private schools 5