I see that there was a child born around the same time as the marriage:
Henry Ashbrook, mmn Lumley, birth reg Mar qtr 1844 York.
Henry was baptised at St Saviour on 29 February 1844. Parents: Henry (painter) and Mary, of Bellerby's Buildings, Garden Place.
He may be the 15mo old Henry Ashbrook (of Aldwark) buried at St Cuthbert's, York, on 6 May 1845.