The Master Mason tracing board is seen again [00:23:54]. Note that the tracing boards, having been relocated from the vault to the evidence room, switch positions since episode one, possibly to provide a framing shot of the square and compasses.
Bones "Intern in the Incinerator" (2007) Directed by Jeff Woolnough, written by Hart Hanson, Kathy Reichs. Emily Deschanel, David Boreanaz, Michaela Conlin, Eric Millegan, Tamara Taylor, T.J. Thyne, Xander Berkeley, Terrell Tilford, Scott Rinker, Tom Virtue, Rochelle Aytes, Sam Jones III, David Greenman, E.E. Bell, J.R. Nutt. USA, English, Colour. 6 November 2007 (Season 3, Episode 6)