Clavius, Christoph, s.J., 1537-1612. No. 2 in **E.5010.54. Christophori Clavii . .. Horologiorvm nova descriptio ... Mogvntize, Sumptibus Antonii Hierat, excudebat Ioannes Vol- mari... Anno M.DC.XII. 240, (3) pp. 34¢m., in 6s.
so,
Y = This card was printed at the Boston Public Library, May 6, 1921.
M1249 — Sun-dials.