tag:blogger.com,1999:blog-8343608.post7186607443510385246..comments2024-03-28T15:17:18.477-05:00Comments on Orange Crate Art: Secret writing, 1917–1918Michael Leddyhttp://www.blogger.com/profile/05547732736861224886noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-8343608.post-63325752865904241122011-04-20T12:26:16.620-05:002011-04-20T12:26:16.620-05:00"The documents contain recipes for invisible ..."The documents contain recipes for invisible ink..." How do you tell when you've run out of invisible ink?Anonymousnoreply@blogger.com