Is this the 1910 census? AL means 'alien', so he hadn't applied to become a citizen at that point. PA means first papers have been put in, not fully naturalized, and NA means naturalized.
Someone might be able to get the full info from the 1920 census for you, it looks to me (from the index) like they're in Livingston County, NY:
William C. Daniels, 1881 Ireland
Margaret, 1880 Ireland
William E(?), 1909, MA
Mary, 1910, MA
Nora, 1913, MA
John F, 1916, NY