Homer evidently intended to publish a small etching after the two central figures of Undertow. In spite of working up a plate to a high degree of detail, he never carried the project to fruition. Only two trial impressions were ever recorded; the Clark sheet, acquired from the Homer family, is the only one whose location is now known. Homer apparently abandoned the more fragmentary Two Heads (Study after Undertow) plate without making any impressions; all those now known were printed decades after his death.