This story was first printed in the Daily Mirror of 27 December 1972 and continued until 10 April 1973 (Numbers F304-G86). It has previously been reprinted in black and white in The Daily Mirror Book of Garth, 1975; Garth Book Two: The women of Galba by Titan Books, 1985 and in the fan publication Menomonee Falls Gazette #114 (18/02/1974) - #131 (17/06/1974) - 6 daily strips per issue
An interesting fact for you historians is that the Daily Mirror of 22 March 1973 (during this story) states: "Southern editions of the Mirror didn't appear yesterday because of industrial action. Here's a double ration of strips". Britain once again was suffering from printer's strikes.