Friedrich Wilhelm Lecher married Friedericke Auguste Kruger pre 1849 Germany.

[chrissiecruiser]

Friedrich and Auguste were my GGGrandparents. He came from Cottbus, Brandenburg, Germany according to emigration records and she "Prussia" taken from National Library of Australia Memorium.   They emigrated to Australia on board the ship "Australia" leaving Hamburg May 2, 1849 and arrived at Port Adelaide 10/9/1849.
Can anyone help me with any details prior to their emigration, that is...marriage, birth dates, originating towns etc? he was a "Maurergeselle".. Mason journeyman, and so must have done an apprenticeship somewhere.
I have been unable to find out anything to date.
Chris Williams

[jorose]

http://trove.nla.gov.au/ndp/del/article/30797315?searchTerm=Lecher
Frederich b. circa 1821

There are some records on familysearch but they are images only so not searchable by name so you will have to work through them page-by-page looking for your folks:
Cottbus city records (misc)
https://familysearch.org/search/collection/1974179
Friedrich may be listed in the military (conscription) records. 

church records (include some from Cottbus)
https://familysearch.org/search/collection/1491272
You may be able to find their marriage shortly before emigration.

There are a few name indexed entries - could these be siblings of your Friedrich?
Ernst Robert b. 1824:
https://familysearch.org/pal:/MM9.1.1/J4JM-RF4
Carl August and Augustine Wilhelmine b. 1825
https://familysearch.org/pal:/MM9.1.1/J4J9-7L4
https://familysearch.org/pal:/MM9.1.1/J4J9-7LZ

It seems the set of records these are from only covers 1824-5 so it's quite likely Friedrich is from this family just his baptism is in another place.