What is a Castle Garden Record Browser?
The records have been entered into the Castle Garden database in alphabetical order, and each has been assigned a number. This number is called the Passenger ID (PID). A browser lets you view the record for a particular PID and advance sequentially through the PIDs viewing the records for adjacent passengers. To be more specific, the assignment of PIDs appear to cycle through the alphabet several times. I have identified at least two ranges of PIDs within which the passenger records are in alphabetical order. Also I have identified another two ranges of PIDs within which the PIDs are somewhat random.
