The ten articles in this collection examine the canon law on marriage. They were written over a period of years and published mostly in the Jurist. The first article notes that jurisprudence tends to evolve in five different ways: by contraction, restoration, expansion, utilization and application. The next seven articles illustrate these different evolutionary styles. The second article is an example of jurisprudence evolving by contraction, article three by restoration, articles four, five and six by expansion, seven by utilization and eight by application. The two final articles deal with the terms annulment, nullity and invalidity. It is intended primarily for students in the law who would presumably have some interest in the topics but who do not have easy access to past issues of the Jurist. The hope is that some will find it helpful to have the articles now gathered together.