These Jubilees were often published during certain anniversaries that towns celebrated after their incorporation. Most that I have seen are for 50, 75 and 100 years. They are like yearbooks for towns that are celebrating their existence and the history and people that made the town what it is today. It's a lot of fun to read through them. I am sure it was lots of work to make them, as they are chock full of very personal accounts and biographies; they are also full of facts, photos, school photos and advertisements. They truly are a treasure. For any town that produced even just one or two over the 100+ year existence of their town, is sure to leave a lasting record for future generations.