Orange Free State 1899 1 Shilling postal note - where was this cashed?

Here's a photo of the note concerned;

The note was issued at Winburg on the 5th. of January 1899,& cashed on the 7th. of January at a place whose name starts with 'Win' & ends in 'sluiting'.

Do you know where in what was the Orange Free State this place was located?

If you know,please let us know.

I can then upload the photos of this note up onto http://www.allnumis.com ,complete with the details.

Aidan.