When using the census, be careful to look at the census date.

The census taker may have come to your ancestor’s house on 16 June 1910, but the questions were supposed to be answered as of 15 April 1910. What if a child was born into the household in May?

Did your ancestor answer the questions “as of” that date? And, did the census take make sure that the questions were answered such? Some census takers were more concerned about accuracy than others, and some of the informants may not have understood about the “census date”.

So, be careful!