Padden, A. N., John, P., Collins, M. D., Hutson, R., Hall, A. R., 2000. Indigo-reducing Clostridium isatidis isolated from a variety of sources, including a 10th-century Viking dye vat, Journal of Archaeological Science 27, 953-956.\\ \\ **Author/s: **Padden A N,  John P,  Collins M D,  Hutson R,  Hall A R\\ **Year: **2000\\ **Topic/s: **\\ **abs. Dating: **10th century AD\\ **Culture/Group: **early Middle Ages\\ **Country: **Great Britain\\ **Site: **York\\ **Lat/Lon (WGS84): **\\ **Link: **\\ **Doi: **\\ **Preservation condition: **\\ \\ **Taxa: **Isatis tinctoria L.\\