There is an old website:
It is tricky to navigate to get to plans. It is easier to go direct:
The following are Crothers' Sea Gull plans available there:
Understand going in,
they are all 1/8" scale - large ships/ small scale - detail can be a problem - near the limit for natural building materials
there are old blue print style - the more the original is used to make a copy the less precise are the fine details.
BLACK HAWK
An American medium clipper ship built in 1856 by William H. Webb, New York, as Yard No. 110. Dimensions 178ft × 38ft 5in × 23ft 9in and tonnage 1109 tons Old Measurement and 1059 tons New Measurement. Dungaugh & duBarry have 1175 tons. Hull Length 32 in.
1/96 SCALE
2 SHEET PLAN
CR-29
PRICE: $ 28.50
COMET
An extreme clipper ship built in 1851 by William H. Webb, New York, as Yard No. 62. Her dimensions were: 229ft × 41ft 4in × 22ft 2in and tonnage: 1836 (old measurement) and 1361 (new measurement). Built with diagonal iron strapping. Her dead rise was 27in.
Model Hull Length 30in.
1/96 SCALE
3 SHEET PLAN
CR-20
PRICE: $ 25.00
RED JACKET
The extreme clipper ship Red Jacket was designed by Samuel H. Pook and built by George Thomas at Rocklane, Maine. She was launched November 2, 1853 and towed to New York to receive spars and rigging. The owners were Seacomb & Taylor of Boston.
1/96 SCALE
3 SHEET PLAN
CR-30
PRICE: $ 30.00
Red Jacket is an absolute monster.
I do not remember LIGHTNING as being a Sea Gull product. It is available at 1/4" from SI.
Every HIC plan in every book except The Baltimore Clipper is available at 1/4" scale from the SI.