In its first incarnation in 1868, the Martindale-Hubbell Law Directory promised to furnish readers with the address of at least one reliable law firm in each city in the United States.

Today’s directory lists far more than that, with profiles of lawyers and firms filling more than a dozen hardbound volumes. Martindale-Hubbell, a part of the Lexis-Nexis group of Anglo-Dutch publishing conglomerate Reed Elsevier, says the directory has biographical information on more than 1 million lawyers and that 95 percent of large firms pay for a directory profile.