A striking split-view chrome card unites two of southeastern Mexico's most compelling sights: the modernist glass-fronted Hotel Manzúr rising six stories above a busy Villahermosa street — its lobby level a sweep of mid-century glazing, American sedans parked at the curb — paired with the moss-draped stone staircase of the Templo de las Inscripciones at Palenque rising into jungle mist, a colossal Olmec stone head from Villahermosa's La Venta park looming in the foreground. The writer, whose message is addressed to "Dear Martha," was on a 22-day tour of Mexico with a friend named Edith, finding the heat equal to midsummer back home. "I got an R.N. to stay with Edith," she confides candidly. "Now I know she is in good hands. I had to get away, as I was tired to do a good job." A poignant human document from the golden age of Mexican group tourism, mailed from Villahermosa with a commemorative 1964 Presa Netzahualcoyotl stamp in violet — a philatelically notable issue.