Master Drawings London is a coordinated sale of master drawings by a number of galleries in London, UK, from 27 June to 5 July, 2012.

This is apparently the 12th such sale, and the event has a dedicated website from which you can access an online catalog. Though it unfortunately takes the form of one of those cutesy page-flipping online magazines, you can zoom in on the images and, if you click the “Menu” button at upper left, you can download a PDF version.

“Drawings” in this case means works on paper and includes watercolor and oil sketches.

(Images above: Charles-Joseph Natoire [with detail], Il Guercino, Eva Gonzalés, Adrian Zingg, Giovan Battista Dell’Era, Jean-Francois Millet, Adolph Menzel, William Callow [with detail])

[Via @American_Artist]

Shelby Keefe is another artist whose work I recently encountered at the Wayne Plein Air Festival just outside of Philadelphia.

Keefe is based in Milwaukee, where she maintains a studio and exhibition space. She works both on location and from her own reference photos for studio paintings.

She has a loose, blocky style, quick and efficient in capturing the essence of the scene before her. She works in oil over high chroma acrylic underpaintings, often allowing the bright colors of the underpainting to play through in her final compositions.

You’ll often hear of artists “smuggling reds” into their paintings in which the subject is largely green foliage, Keef, however, brandishes her underpainted reds with abandon. allowing them to add energy and vibration to her greens.

On her website you will find a slideshow presentation of both studio and plein air work, along with figurative pieces and information about her painting demonstrations, workshops and her other endeavors.