Complex sentence: Morning meals would not include any meat, but would likely include 1 ⁄ 4 gallon (1.1 L; 0.30 US gal) of low alcohol-content beers; and uncertain quantities of bread and ale could have been consumed in between meals.
Split into simpler sentences: Morning meals would not include any meat, and would likely include 1 ⁄ 4 gallon (1.1 L; 0.30 US gal) of low alcohol-content beers. Uncertain quantities of bread and ale could have been consumed in between meals.