[This study], undertaken whilst on her honeymoon at Lake Piedeluca, [was] later used as the background of Knights' epic Santissima Trinita, 1924-30. [Note that another site refers to this work as a Landscape Study for Edge of Abruzzi; boat with three people on a lake. While at first glance the study seems very similar to the Edge of Abruzzi, it can also be seen as quite similar to the background in Santissima Trinita, so who knows? Only Winifred....]
Knights made extensive landscape studies during her stay in Italy (see Italian Landscape, 1920, Tate Gallery NO3683), most frequently of the countryside around Lazio, Umbria and the Abruzzi. She often worked in triplicate, creating a drawing, then an outline on tracing paper and lastly a colour study. This colour study is sold with a brown ink outline drawing of the same subject.
(http://www.lissfineart.com/82sub0_163.htm)