Quarterly of Art History Institute at the University Wrocław “Quart” 2(48)/2018 has just published my article: “An attribution for two late Gothic central-European panels, in English public collections, depicting episodes from the life of St. Barbara”. The subject of this article is a pair of late Gothic panels, now separated but originally part of one retable: the Flagellation of St. Barbara in York Art Gallery (inv. no. YORAG 752) and the Martyrdom of St. Barbara in the collection of the National Trust at Upton House, Warwickshire (inv. no. 446804). They were created in the circle of Master of the Schotten Altarpiece in Vienna and I believe that there was one more panel that came from the same retable: a fragment depicting Christ visiting an imprisoned saint, which is unfortunately now lost (last recorded in 1924 as having been on the Munich art market). I suggested attributing this retable to Hans Siebenbürger, who is also believed to be the author of panels of St Ursula retable from Lilienfeld Abbey. Both retables are likely to have been created around the same time, that is ca. 1470.
The article is available here: http://quart.uni.wroc.pl/archiwum/2018/48/Quart48_01_Lanuszka.pdf