Edward Rigby was born c.1653, the second but first surviving son of Edward Rigby, who he succeeded in 1686. He was educated at Preston School and Christ’s, Cambridge, and then trained as a lawyer. He died unmarried in 1706.
The above information is taken from The History of Parliament, which includes the following biography:
Rigby contested Preston unsuccessfully in 1689, and again in 1690 when he was said to have ‘quitted his interests to the chancellor [of the duchy of Lancaster]’. He was dissuaded from standing for the borough at the by-election of 1690 by the Earl of Derby, and declared his support for the candidacy of Sir Edward Chisenhall. Despite these setbacks Rigby appears to have maintained an interest at Preston, for example donating a street lamp to the borough in 1699, and in the first election of 1701 headed the poll. He proved to be an inactive Member, and at the next election was defeated. He stood again in 1705, when the Duke of Hamilton, a local magnate, reported that Rigby was one of two candidates ‘in low esteem in this place’. Hamilton also claimed that ‘if anybody of tolerable character had stood [against Rigby] they had infallibly have claimed it’. Despite Hamilton’s disapproval of him, Rigby appears to have been a Tory, being classed as a ‘Churchman’ and voting on 25 Oct. 1705 against the Court candidate for Speaker. He died suddenly on 2 May 1706. He left his property, including a mansion in Goosnargh [Longley Hall, see entry for his father], to his brother Charles, a lawyer employed by the duchy of Lancaster and who was active on behalf of Tory candidates in Preston in 1710 and Lancashire in 1713, and his sister Lucy. 
Richard Harrison, the editor of the Rawstorne Diary, was co-author of this History of Parliament entry.