Hover-Piano as Mr. Rosebank's invention: recurring across b11, b12a, b12b
x_p5_363 recurring_elementThe Hover-Piano, attributed as Mr. Rosebank's invention, appears as an in-world element across three books with consistent authorship attribution.
Evidence
| b11: Mrs. Rosebank attributes Hover-Piano to her husband | May I present, my husband's genius invention, the Hover-Piano! | b11:c02:p054 |
| b12a back-matter: Hover Piano described as built by Mr. Rosebank | The Hover Piano is an extraordinary and complicated flying machine built by Mr. Rosebank in his spare time. | b12a:c99:p271 |
| b12b back-matter: same Hover Piano description | The Hover Piano is an extraordinary and complicated flying machine built by Mr. Rosebank in his spare time. | b12b:c99:p226 |