This is the third article in the series of negatives and slides from my collection that I have attempted to colourize with the aid of photoshop. This article features some of the Clyde steamers. The previous two articles featured the steamers of Messrs MacBrayne and the highlands and islands. Commercial software can often provide a reasonably acceptable representation of the background, although not always, and sky and sea colour are frequently problematic. I have also tried smart iterative software (Photorevive) in a few cases but while it generally does better with details and background, it end up with more complex impressionist-like colouring that I personally dislike. The colorings of steamers and their funnels require special attention. The simplest colourizations are those of the Buchanan and Williamson fleets where funnels are black and white. Some of the earliest slides of...