1841 & 1851 Census - Mill Street Hull

[Milliepede]

Is this your Mark Haycock in Mill Street Hull 1851?

Mark Haycock 23 born Nottingham
Catharine Haycock 23 wife born Ireland
Mark Haycock 9 months son born Hull
Catherine Welsh 5 months daughter? born Hull

then there are some lodgers but I can't actually see the Haycocks on the page just the transcription 

Maybe it skipped a page or something - Catherine Welsh is on top of the page and the previous page bottom is more Welsh people not Haycocks.  Can anyone figure it out?

[Milliepede]

Yes I have seen the marriage of Margaret Tymon and Thomas McColay.

Is there an occupation for Thomas?

Wouldn't Margaret have a different surname to her father if she was a widow?