Portel is not noticed by Rico & Sinobas or Cotarelo & Mori. 11 lines of alphabet including subscript with tiny flourish. Plate mark 290 x 204mm. Watermark three circles one upon another: the uppermost crowned, with griffin supporters and cross within, the middle circle with the letters CC and the lower with the number (?) 4. Signed at foot, 'El Maestro Theodoro Vicente Portel me escri[b]a. En la Compania de JHS'. No date or place, but probably Madrid, latter half 17th century. Two short tears in upper margin and small worm hole in another. Muestra original grabada de caligrafía.