Description
The sixth Mark Treasure mystery and the most difficult to find. Signed by the author and dated 1984 (year of publication) to title page. Laid in is a stamped envelope from the author to John Cooper, co-author of Detective Fiction: The Collector’s Guide with a signed postcard inside discussingWilliams’ difficulties in writing the novel and his completion of the next in the series. Spine a little sunned otherwise Near Fine in VG dustjacket

![Treasure Preserved [signed]](https://www.hadwebutknown.com/wp-content/uploads/2025/12/18834_1-scaled.jpg)
![Treasure Preserved [signed] - Image 2](https://www.hadwebutknown.com/wp-content/uploads/2025/12/18834_2-scaled.jpg)