His closest rival , Ady Whitwan from the Army , finished three minutes later in 1.10. 51 .
The first runner home was Michael Kallenberg of the RAF in a time of 67 minutes and 49 seconds .
Michael Kallenberg 's closest rival , Ady Whitwan from the Army , finished three minutes later in 1.10. 51 .
The first runner home was Michael Kallenberg of the RAF in a time of 67 minutes and 49 seconds .