To join the project please order a Y-DNA kit from Family Tree DNA in Houston, USA. We would suggest that you order the 67-marker Y-DNA test.
https://www.familytreedna.com/group-join.aspx?Group=Ledingham
Alternatively order a test kit from Scotland via this link
https://www.yourscottishancestry.com/product.php/13/18/y_dna_test_67_marker/
Ledingham Y-DNA 