With Election Day four days away, more than 1,000 Harvard voters have already cast ballots in person or returned mail-in ballots, giving election workers a steady stream of activity ahead of the Nov. 3 state election. Harvard has 4,899 registered voters, according to Town Clerk Rose Miranda. As of Monday, Oct. 26, the town had mailed 1,644 ballots to voters and received 893 back, a return rate of 54%. Another 171 residents had cast their ballots in person during early voting, bringing the total number of ballots cast or returned ahead of Election Day to 1,064, or nearly 22% of…