After graduating college years ago, I worked a stint at the Museum of Fine Arts, Boston. A chief job perk was the opportunity to spend lunch breaks sketching directly from my favorite museum paintings. At the time, most MFA-collection portraits by my heroes John Singer Sargent and Anders Zorn were housed in the upper rotunda, just outside the library. It was my favorite location in the entire museum. Since then, I’ve returned to the MFA with my sketchbook many times. Today I’m sharing one such museum sketch of Sargent’s 1887 Mrs. Edward Darley Boit (Mary Louisa Cushing), mother of the four daughters in Sargent’s famous 1882 painting, The Daughters of Edward Darley Boit.