Alligator (cancelled 1863) and Ontario (cancelled 1863)

Scale 1:24. Plan shows the midship section and framing detail for the corvettes Alligator (cancelled 1863) and Ontario (cancelled 1863). The drawing bears the signature of Isaac Watts[1st Assistant Surveyor, 1848-1860], Joseph Large [2nd Assistant Surveoyr 1859-1860] and the initials J.L.