| Issue | #29 |
| Published | July-August 1956 |
| Cover Price | 0.10 USD |
| Pages | 36 |
| Editing | ? |
| Characters | Lassie |
| Genre | animal |
| Pencils | ? (painting) |
| Inks | ? (painting) |
| Colors | ? (painting) |
| Synopsis | A brief history and description of the dalmation. |
| Genre | fact |
| Letters | typeset |
| Notes | Inside front cover. No credits. |
| Characters | Buff Saunders (friend, treasure hunter); Gerry Lawrence; Lassie; Rocky Langford |
| Synopsis | In Colombia Rocky and Gerry, with Lassie, decide to help Buff Saunders, an old friend, find an old foundered Spanish treasure ship. On a skin-diving search Rocky and Buff are attacked by a manta ray but Lassie saves them. Lassie then finds the ancient treasure chest. |
| Genre | animal |
| Pencils | Ralph Mayo ? |
| Letters | typeset |
| Notes | No credits. Story marked "567," which is a date code. |
| Characters | Gerry Lawrence; Lassie; Mariles (chief mining engineer); Rocky Langford; Valdo (mine foreman) |
| Synopsis | Rocky and Gerry, with Lassie, travel to a Colombian emerald mine that apparently is exhausted. They then stop the superstitious miners from burning rare plants to appease their gods by showing where more emeralds might be found. Lassie finds out that Valdo, the foreman, is stealing the emeralds and everyone is grateful. |
| Genre | animal |
| Letters | typeset |
| Notes | No credits. |
| Characters | Dorado (collie); Luis (old gaucho) ; Rios (young gaucho) |
| Synopsis | Four gauchos and Dorado, a small dog, are herding longhorns. Rios, a young gaucho, dislikes Dorado while Luis, and old gaucho, speaks well of the dog. While crossing a racing river, Rios is saved by the dog from drowning. |
| Genre | animal |
| Letters | typeset |
| Notes | No credits. |
| Characters | hunter (Mateo's father); Mateo; Reina and her two cubs |
| Synopsis | A hunter and his son Mateo want to kill Reina for her hide, but then stop because she is defending her cubs. Months later Mateo is hurt and this time his father must defend him from Reina who, however, somehow remembers the previous incident and leaves. |
| Genre | animal |
| Letters | typeset |
| Notes | No credits. |
| Characters | Cashimir Arbolon (railroad worker); Gerry Lawrence; Lassie; Rocky Langford; Tipi (Vernal's monkey); Vernal (chief engineer) |
| Synopsis | Rocky and Gerry, with Lassie, go to Quito in Ecuador for the inauguration of a new railroad line where Vernal, the chief engineer, has a dispute with Arbolon, a worker. Arbolon's gang then sabotages a railroad bridge during the trial run and hold Rocky and Gerry captive. Lassie then is able to warn the train in time and the police arrest the culprits. |
| Genre | animal |
| Letters | typeset |
| Notes | No credits. |
| Notes | House ad for Tom and Jerry Summer Fun (#3). |
| Characters | Bill Wisdom |
| Synopsis | Tips on how to play safely at the beach. |
| Genre | fact |
| Letters | typeset |
| Notes | Inside back cover. Sponsored by Wrigley's Juicy Fruit Gum. No credits. |