| Issue | #12 |
| Published | July-September 1953 |
| Cover Price | 0.10 USD |
| Pages | 36 |
| Editing | ? |
| Notes | Indicia says "Published quarterly". |
| Characters | Lassie |
| Genre | animal |
| Pencils | ? (painting) |
| Inks | ? (painting) |
| Colors | ? (painting) |
| Notes | Indicia says "Published quarterly". |
| Synopsis | Facts about the bald eagle and the golden eagle. |
| Genre | animal |
| Pencils | ? [as RT or PT] |
| Inks | ? [as RT or PT] |
| Letters | typeset |
| Notes | Signed PT (or RT) in lower right corner. |
| Characters | Rocky; Gerry; Lassie; Professor Johnson; Doctor Stilson |
| Synopsis | Lassie interrupts a game of tennis with a stick which turns out to carry a help-message. |
| Genre | animal |
| Letters | typeset |
| Characters | Lassie; Steve; Rocky; Gerry; "Sonny"; "Sonny"'s pup; unnamed vet |
| Synopsis | On a car ride, Gerry, Rocky and Lassie encounter a young boy and his puppy. The puppy has been hit by a car. |
| Genre | animal |
| Letters | typeset |
| Characters | Rocky; Gerry; Lassie; Sue; Mr. Lawrence; Ben; bellboy |
| Synopsis | While preparing for the final exams at college, Gerry receives a cable from Mr. Lawrence, saying that he'll fly over for graduation. He brings Ben with him, a surprise for Gerry and Rocky, who have their own surprise for Mr. Lawrence: At the end of the story, Gerry is Mrs. Langford. |
| Genre | animal |
| Letters | typeset |
| Notes | This is the first appearance of Ben after he was left at home in issue #3. Story ends on back cover. Inside back cover in black and white. |