05:30Unearthing MysteriesSeries 1Episode 3: Lost Map of LondonBBC Radio 4 Extra Duration: 30 minutes Sun 12th Apr 2015, 05:30 on BBC Radio 4 ExtraWith no surviving copies of London's oldest known map, Professor Aubrey Manning traces its Tudor origins.GenresFactualHistoryFormatsDocumentariesBrandUnearthing MysteriesSeriesUnearthing Mysteries: Series 1 Source: BBC Online