Smith, Sons & Laughland was a textiles manufacturer based at 75-87 Mitchell Street, Glasgow. The warehouse in Glasgow stored hosiery, tweeds, flannels, linens, cottons, and ready-made clothing. The company was formerly known as George Smith & Sons who separated their textiles business to go into shipping in the 1860s. I have been unable to find out the exact dates when Laughland was in operation, though I am not aware of any overprinted stamps beyond the Edward VII 1d issue.
by Mark Matlach