The directories provide a wealth of information. In many cases, they include the occupation (and sometimes the employer) of the individuals listed. Beginning in 1884, they also contain a "criss-cross" directory - that is, individuals are listed by name, and there is a separate listing by address. This enables the researcher to determine who lived at a particular address in a particular year. Front matter often includes directories of schools, churches, charitable institutions and the like. While Caron is the best known and most common publisher, city directories were published by a number of different firms, particularly in the 19th century. Directories were published under such names as Campbell's, E. Coy, Edward's, Gabriel Collins, German and Brothers, George W. Hawes, Grooms and Smiths, Haldeman's, John B. Jegli's, Sholes', Smith's, and Williamson's. There is also a Standard pocket street directory of Louisville (1934).