The writer is considering deleting the underlined portion (ending the sentence with a period). Should the writer make this deletion?
In 1990, chef Louis Szathmary, a voracious collector of cookbooks, donated approximately 20,000 culinary artifacts to the University of Iowa library. The gift included more than 100 manuscript recipe books — collections of recipes handwritten by the people who used them. The manuscripts, some of which date back to the seventeenth century, are an invaluable resource for food historians as well as the general public.