Well done, Embers! Superb editing. Any clues on how you did it? I am clueless in such matters.
After I save the image, I usually right click on it and open it in MS Picture It Premium 10. For pictures that have to be spliced, I straighten the image using some photo edge or printed straight line. There is a feature in "Picture It" called "Freehand Painting" that allows you to match a color, such as a background, then virtually spray paint out blemishes and such things as superflous text.
Once both sections to be spliced have been straightened and cleaned, I make use of MS paint and a template, kindly supplied by Macoran. After opening the template one selects the edit function and the "Paste from" selection. This allows you to paste the left side of the image to be spliced onto the template. Move the image to the left so that only a small section shows, then again select "paste from" and paste the right-hand section of the image. As long as you keep the cursor on the new section to be pasted you can move it to align with the right edge of the original image. Once you move it off the new section you are stuck with its position. You may find that you can't get the images to line up because of a gap, which you will later have to fill in, or because the images are of slightly different size. You can then go back into MS Picture It and resize the right-side image, usually by trial and error.
When a gap in the images exists, as happened with the scans from the RAF Flying Review
, the fun begins. You have to decide whether or not enough information exists to bridge the gap. This can be done using both of the programs previously mentioned. "Picture It" permits one to crop out sections and reinsert them into the image, which helps to reproduce repetitive images such as structural elements. The "Freehand Painting" permits shading to be added, and the MS Paint program has functions to draw lines and curves of varying thickness.
Occassionally, one has to admit that the illustrator's original intent has been lost and you just have to do the best you can. My philosophy then is to tell myself that it is worthwhile to have the restored image, even with small areas of uncertainty.
Try it! You learn by doing, and good luck! And, by the way, Irish, happy St. Pat's Day.