| Person or Persons Unknown | |
| Author: | Bruce Alexander |
| Country: | United States |
| Language: | English |
| Series: | Sir John Fielding, #4 |
| Genre: | Historical Crime novel |
| Release Date: | 1998 |
| Media Type: | Print (Hardcover, Paperback) |
| Pages: | 336 pp |
| Isbn: | 0-425-16566-3 |
| Oclc: | 39982989 |
| Preceded By: | Watery Grave |
| Followed By: | Jack, Knave and Fool |
Person or Persons Unknown is the fourth historical mystery novel about Sir John Fielding by Bruce Alexander.
Women of the street are being brutally murdered in Covent Garden, and Sir John is baffled. Worse, one of the Fieldings' acquaintances becomes the prime suspect.