Complex sentence: Robert had not wished for a long engagement, but it took a while until a suitable house was found at 5 Greenfield Place in Newcastle, and Robert and Fanny married in London on 17 June 1829.
Split into simpler sentences: Robert had not wished for a long engagement, but it took a while to find a suitable house. One was found at 5 Greenfield Place in Newcastle and Robert and Fanny married in London on 17 June 1829.