"Body missing. Reward for information"
-- announcement in the "Deaths" section of the Classified Advertisements of the Daily Prophet (DP2)
Barnabas Blenkinsop’s mysterious death is reported in the Daily Prophet (DP2)
Mr Blenkinsop's presumed death occurred on November 20, 1998 and his obituary appeared in the Daily Prophet. A reward was offered for information about what happened to his body since all that was found in his bed at St Mungo's was a tin of anchovies (DP2)
While the date printed on DP2 is 8 February 1999, the timeframe for these events is 1992-1993.