| Original Title | Dumb Witness (UK) / Poirot Loses a Client (USA) |
| Original Language | English |
| Author | Agatha Christie |
| Series | Hercule Poirot, Serie With Crow |
| Translated by | Beata Hrycak, Anna Rojkowska |
| Cover photo | Marek Machay |
| Editor | Karol Zieliński |
| Technical Editor | Natalia Wielęgowska |
| Revised by | Janina Gerard-Gierut, Ewa Krawczyńska-Olesińska |
| Copyright Holder | Agatha Christie Mallowan |
| Publisher | Wydanwictwo Dolnośląskie Sp. z o.o. |
| Printed and Bound by | Prasowe Zakłady Graficzne Sp. z o.o. |
| Format | Paperback |
| Language | Polish |
| Location | Poland |
| This Edition Published | 2004 |
| Copyright | 1937 |
| Pages / Font | 304 pages |
| ISBN 10 | 83-7023-723-1 |
| Barcode | 9788370237233 |
| Notes | Hercule Poirot (16)
Pocket edition. Belongs to publishing serie with crow sign.
2nd edition. |
