 | Manuscript dating. | (2) |
| Manuscripts Denmark Facsimiles. | (1) |
| Manuscripts, English (Old) Editing. | (2) |
| Manuscripts, English (Old) England London Facsimiles. | (1) |
| Manuscripts, English (Old) Facsimiles. | (1) |
| Manuscripts, Medieval England Editing. | (2) |
| Manuscripts, Medieval England London Facsimiles. | (1) |
| Middle Ages. | (1) |
| Monarchy History 1500. | (1) |
| Monarchy in literature. | (1) |
| Monsters. | (3) |
| Monsters Drama. | (1) |
| Monsters in literature. | (26) |
| Monsters in literature Bibliography. | (2) |
| Monsters in literature Handbooks, manuals, etc. | (1) |
| Monsters Juvenile literature. | (4) |
| Monsters Poetry. | (100) |
| Musicals Librettos. | (2) |
| Musicals Vocal scores with piano. | (1) |
| Mythology, Germanic, in literature. | (1) |
| Names, English (Old) | (1) |
| Names, Geographical English (Old) | (2) |
| Names, Swedish. | (1) |
| Operas. | (2) |
| Oral tradition England. | (1) |
| Oral tradition Scandinavia. | (1) |
