The small pocket diaries begin in January 1892 and run through 1904, about thirteen months before his death. There is no diary for 1893, when Camacho was working for the Western National Bank and Hamilton Bank Note Company. The diaries were clearly carried on Camacho's business trips, both around New York and to foreign countries for the purpose of recording his business activities. As such they shed light on the type of networking and hustling required of a sales representative.

However, the diaries are much richer, as Camacho recorded all sorts of personal observations on things ranging from the weather through the hardships of travel, the state of his health, family and domestic relations, and participation in the rich cultural life of New York City, to personal introspections. Given his mixed heritage as the child of the elites of two hemispheres, Camacho comes across as a person equally at home in both worlds.

The diaries contain observations on such political events as the 1896 McKinley-Bryan presidential contest, the Spanish-American War, U.S-Cuba relations, and the various Latin American revolutions and coups that interrupted his travels.

There are also entries illustrating Camacho's traditional Catholic piety and his musings on sickness and mortality. His reflections on the loss of his young wife are particularly poignant. At the other extreme, he repeats poems and risqué limericks shared with his business associates. Taken together, the diaries yield a well-rounded picture of a somewhat atypical but fully-alive salesman at the turn of the nineteenth century.