Keywords: Hess Boniface leaves England 21.jpg en Back of prayer card containing brief prayer in praise of labor Card is signed by Thomas Spreiter OSB Apostolic Vicar of Dar-Es-Salaam 1906-1920 hence the dating Early 20th century prayer card 1906-1920 Other side of card contains reproduction of painting by Johann Hess 19th c artist 1906-1920 PD-Art Holy card Thomas Spreiter |