A New Look at Immigrant Passenger Manifests
The second type of annotation was made after arrival and includes: Numbers similar to “435/621″ with no date is the New York file number which indicates an early verification/record check. The actual file no longer exists.
The date of the Certificate of Arrival or the date of Application may follow the Certificate of Arrival number or Application number.
The manifest page for the Siborowski/Skowronski family shows a number of these annotations, including “S.I.” showing that one family was sent to a Board of Special Inquiry, an “X” showing that the Siborowski/Skowronski family was detained, and a listing of numbers indicating that Certificates of Arrival were issued for some of the passengers, including Pawel Skowronski.
Record of Detained Aliens and Record of Aliens Held for Special Inquiry