After seeing the MI for the STARKEY's I knew for sure that William was married twice to women named Margaret who were about the same age. I knew William was married to my 4Xgt. aunt Margaret CLARKE b.1828. I hadn't realized that Margaret died in October 1860, and the Margaret on the 1861 census was his second wife. William's mother-in-law was living with them on the 1881 census and her name was Catherine SKILLICORN.

I haven't seen the 1861 census - can't find it on Ancestry yet- but my cousin has given me this information:

1861 IoM
April 8th
Ballafletcher, Braddan

William STARKEY, husband
Margaret, wife
Elizabeth, dau
Margaret J., dau, aged 3 months
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1871 IoM
April 3rd
Ballacagan, Lonan

William STARKEY, 42, lead washer
Margaret, 42
Margaret, 9
William, 7
George, 5
John J., 3 months
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1881 IoM
April 4th
17 Mile Road, Lonan

William STARKEY, 52, lead ore dresser
Margaret, 53
George, 16
Edw., 10
Catherine SKILLICORN, 80, widow, invalid