i) Lesson VIII, signed and dated, with an artist's seal (lower right), numbered 19/175 (lower left), 29 x 29.5 cm (11 3/8 x 11 5/8 in), ii) Lesson VI, signed and dated, with an artist's seal (lower right), numbered 96/175 (lower left), 29.5 x 29.8 cm (11 5/8 x 11 3/4 in), iii) Lesson IX, signed and dated, with an artist's seal (lower right), numbered 32/175 (lower left), 29 x 29.5 cm (11 3/8 x 11 5/8 in), iv) Lesson VII, signed and dated, with an artist's seal (lower right), numbered 93/175 (lower left), 29 x 29.8 cm (11 3/8 x 11 3/4 in)
