Restoration record · Volume 01
The Underground Palace
The book contains Calleja’s original artwork restored from a surviving copy of El Palacio Subterráneo, Serie III, Tomo 43. This page preserves the production detail intentionally omitted from the reader edition.
Image-by-image record
| Role | Source condition | Work performed |
|---|---|---|
| Opening plate | Complete but faded and soft. | Local tonal restoration at the native crop size; composition and engraving texture preserved. |
| Chapter vignette | Complete but faded and soft. | Local tonal restoration. The reading-layout transparency was made with an inspected silhouette mask; scene pixels were not regenerated. |
| Executioner, underground hall, and Aristides plates | Complete high-resolution crops. | Light tonal normalization and print preparation; no material reconstruction. |
| Spanish and English front covers | Complete color composition with age and handling wear. | Restored while preserving the original composition and palette. English lettering follows the Spanish design. |
| Spanish and English back covers | The surviving Spanish back cover was materially damaged. | The Spanish parent was reconstructed from the surviving scan; the English derivative changes only the plaque lettering. |
| Spanish and English title pages | The surviving title page was damaged. | Image-generation-assisted restoration under human review, checked against the surviving impression and normalized for the print layout. |
Restoration principles
The surviving impression remains the authority. Repairs must preserve the original subject, composition, borders, lettering relationships, engraving texture, and period palette. Natural paper tone or light wear may remain when removing it would erase authentic printing character or require invented detail.
Technical production records—including exact source and master hashes, dimensions, promotion history, masks, and independent visual-review evidence—are maintained with the edition archive.