There are two records in the ABCD for S. alba from Roman Britain:
(i) Reid C. 1901-03, 05-08. [Plant remains] Passim. and [Mr Boodle] 1909.
p. 477. In: (Fox G E and) St John Hope W H. 1901-1908. Excavations on the
site of the Roman city of Silchester, Hants in 1900-08. Archaeologia.
57-61. Various pp. [reported as Brassica alba; I can check the specific
report in which it appears, though there probably won't be much
'contextual' information for such an early record, and the dating won;t be
better than 'Roman'.
(ii) Willcox G H. 1978. Seeds from the late 2nd century pit F28. 411-4, and
Table 5. In: Dennis G. 1978. 1-7 St Thomas Street. 291-422. In: Southwark
Excavations 1972-72. London, Middlesex and Surrey Archaeol. Socs. Joint
I can send a scanned copy of the relevant pages of both of these if it
Marijke may well have found other records during the work she and her
students did for the paper they published in Britannia recently:
van der Veen M., Livarda A and Hill A. 2007. The archaeobotany of Roman
Britain: current state and identification of research priorities. Britannia
-- Dr Allan Hall, English Heritage Senior Research Fellow, Department of
Archaeology, University of York, The King's Manor, York YO1 7EP, U.K. Tel.
+44 1904 434950/fax: 433902
(You can e-mail me on arh1 or biol8 (i.e. BIOL8 not BIO18!) - but arh1 is