SONSI member Kathryn Killackey recently wrote about her archaeological illustration techniques for the popular sociocultural anthropology blog Savage Minds. There are two parts to her interesting story:
http://savageminds.org/2016/01/21/analog-to-digital-and-back-again-part-i/
http://savageminds.org/2016/01/27/analogue-to-digital-and-back-again-part-ii/