A study on Sir Thomas Lawrence

John Julius Angerstein. Graphite & White Chalk on Tone Paper

A study on Rembrandt van Rijn

Portrait of a Woman. Graphite & White Chalk on Tone Paper

Roberto Sierra

Charcoal on paper

A study on John Singer Sargent

Madam X. Graphite & White Chalk on Tone Paper

Skull

Drawing of a skull. Graphite and white conté on toned paper

José Ferrer

Charcoal on paper

Justino Díaz

Charcoal on paper

A study on Diego Velázquez

Juan de Pareja. Graphite & White Chalk on Tone Paper

Self-Portrait (2009)

Colored pencil on toned paper

Maritza at Five Months Pregnant

Graphite on paper

A study on John Singer Sargent

Self-Portrait. Graphite & White Chalk on Tone Paper

A study on Thomas Anshutz

A Rose (detail). Graphite & White Chalk on Tone Paper

Abraham Lincoln

After a photograph by Alexander Gardner on February 5th, 1865. Mixed media on watercolor paper

A study on Rembrandt van Rijn

Self-Portrait. Graphite & White Chalk on Tone Paper

Abraham Lincoln

Drawing of a life mask of Abe Lincoln. Graphite on paper

A study on Pierre Narcisse Guérin (possibly a follower)

Study of a Nude Man. Graphite & White Chalk on Tone Paper

A study on John Singer Sargent

The Onion Seller. Graphite & White Chalk on Tone Paper

Ludwig van Veethoven

Drawing of a life mask of Beethoven. Graphite on paper

A study on Johannes Vermeer

Girl with a Red Hat. Graphite & White Chalk on Tone Paper

A study on Joaquín Sorolla

Aureliano de Beruete. Graphite & White Chalk on Tone Paper

A study on Ilia Repin

Portrait of Modest Mussorgsky. Graphite & White Chalk on Tone Paper

Peras

Mixed media on watercolor paper

A study on Diego Velázquez

Portrait of a Man; Possibly a Self-Portrait. Graphite & White Chalk on Tone Paper

A study on Diego Velázquez

Rokeby Venus. Graphite & White Chalk on Tone Paper

Charcoal study

Charcoal on paper