British children signing up in London for evacuation to US during World War II

Small British girl, older sister and their mother sitting at desk being interviewed by official, US Ambassador to Great Britain Joseph P. Kennedy, Sr. standing behind them / closer view of little girl talking to Kennedy / CU older girl / two girls and their mother sitting at table with women / close view of woman typing on typewriter / two girls and their mother sitting at table / mother and older girl examining document / boy sitting at table with his mother and another woman / boy and his mother signing documents / man wipes ink off boy's hand after man took his fingerprints / two boys with their mother at table with woman typing / closer view of one of two boys / other boy signing document while his mother watches / same boy blots his signature / Note: exact day not known