Here is what I found in the 1910 Vermont Census, Rutland County, Poultney Sheet 6. Although it says the mother has 4 living children, only 3 are listed. Perhaps the 4th is Arvon Lloyd?

Name Relationship Sex Color or Race Age at last birthday single, married, widowed, or divorced Number of years of present marriage Number born Number now living Place of birth Place of birth of Father Place of birth of Mother Year of immigration to the U.S. Occupation Trade or profession
JONES, David L HEAD M W 41 M 17 WALES WALES WALES 1884 GROCER GROCERY STORE
JONES, Ann L WIFE F W 45 M 17 6 4 WALES WALES WALES 1888
JONES, Katie L DAU F W 15 S VERMONT WALES WALES N
JONES, Margret L DAU F W 11 S VERMONT WALES WALES
JONES, John L SON M W 9 S VERMONT WALES WALES