[rhettyeakley]

Burdick basically did whatever he wanted, but there was a rhyme and a reason...

N-cards are basically seperated by Manufacturer (until you get up into the N400-N690's). For example
N1-N68 Allen & Ginter
N70-N158 Duke/Gail & Ax
N162-N175 Goodwin & Co.
N180-N206 Kimball & Co.
N210-N246 Kinney Bros.
etc., etc.

When he was breaking down the T-cards he abandoned the manufacturers and went alphabetical (most were made by the ATC so Manufacturers no longer seemed relavent, and there was too much variation)...
T1-T24 were for large cards (not true cabinets but we call some of them that anyways...Turkey Reds, etc.)
T25-T121 were non-sports T-cards listed alphabetically by Series Title
examples...
T25 Actors
T39 Battleships
T58 Fish
T80 Military Series
T96 Prize Dog Series
T113 Types of Nations
T121 War Series

T122-T199 were used as needed for new additions to the above that were found later.

T200 and up were used for sports T-cards. He sorta alphabetized them by putting "Baseball" as T200-T217 ... T218 Champion Athletes ... T222 Famous Baseball Players ... T223 Prizefighters ... T227 Series of Champions ... T230 World's Champion Athletes.

T231 and up were used much like T122-T199 above (as additions to T200-T230)

He didn't really care about organizing the "Baseball" series but he did keep them together in a block.

Hope this helps a little, it is a little simplistic as it is a little more complex than that but it shows the basic organizational model he was going with.
-Rhett