Page is a not externally linkable
-- Google SEO News and Discussion
---- 17 May 2013 - GWT Sudden Surge in Crawl Errors for Pages Removed 2 Years Ago?
Frost_Angel - 2:18 pm on May 29, 2013 (gmt 0)Thread source:: http://www.webmasterworld.com/google/4575982.htm
OK - that makes sense. Makes me worry less. Must be something they run before updates.
Brought to you by WebmasterWorld: http://www.webmasterworld.com