Thanks Malachi. I found what I was looking for at the link:
"Rhode Island’s place in the new Union, created by the Constitutional Convention in Philidelphia in 1787, was decided only after a long and closely contested political battle. Rhode Islanders were very jealoous of any outside interference with their affairs, particularly with their trade, and hence the State did not send delagates to the Philidelphia Convention.
After the new Federal Constitution had been adopted by its framers, Rhode Island delayed until 1790 before calling a State convention to ratify the new instrument of government. In July, 1789, Congress sought to force Rhode Island into the Union by placing the State (and also North Carolina, which had not ratified) outside the revenue limits of the rest of the country, but it postponed enforcement of this dicriminatory act to 1790.
A Rhode Island convention finally met in the Old Court House at South Kingstown on March 1, but this assambly adjourned without coming to a favorable decision. A second convention met at Newport two months later, and ratified the Federal Constitution on May 29, by the vote of 34 ayes to 32 nays."
- Rhode Island: A Guide to the Smallest State By Federal Writers’ Project (p.46)
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I also found this which adds to it and supports it:
http://books.google.com/books?id=xZFrVbQ9NIgC&pg=PA38&lpg=PA38&dq=rhode+island+ratification+%2Bembargo&source=bl&ots=Jx1bcYjFuX&sig=ue6XMhh3goB3FTiExMCPkqsLGNM&hl=en&ei=QTqjTuasGKSFiAK7-rxn&sa=X&oi=book_result&ct=result&resnum=8&ved=0CEkQ6AEwBw#v=onepage&q=rhode%20island%20ratification%20%2Bembargo&f=false
"Rhode Island, the only state refusing to send delagates to Philidelphia, at first did not comply with Article VII’s requirement that ratification be accomplished by convention. The anti-federalists disliked the amplitude of Congressional power, the absence of a bill of rights, and the ban on state issuance of paper money. The antis, who dominated the legislature, tried to avoid a ratifying convention on the likely assumption that it would have voted for the Constitution.
Although a referendum was attacked by federalists as inconsistent with the specified ratification mode, the Rhode Island legislature ordered the Constitution submitted directly to the towns for a vote, where in March 1788 it was rejected. In October the legislature submitted the Clinton letter’s proposal for another federal convention, but the response from the towns was too late and too scattered to be effective. On May 29, 1790, as Congress threatened a trade embargo, Rhode Island by state convention ratified the Constitution."
- Constitutional Brinksmanship: Amending the Constitution by National Convention By Russell L. Caplan (p. 38)
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Furthermore:
http://en.wikipedia.org/wiki/History_of_Rhode_Island
"Rhode Island was the last of the original 13 states to ratify the United States Constitution (May 29, 1790)—doing so after being threatened of having its exports taxed as a foreign nation. Rural resistance to the Constitution was strong in Rhode Island, and the anti-federalist Country Party controlled the General Assembly from 1786 to 1790.
In 1788 anti-federalist politician and revolutionary general, William West, led an armed force of 1,000 men to Providence to oppose a 4 July celebration of the 9th state ratifying the Constitution. Civil war was narrowly averted by a compromise limiting the Fourth of July celebration."
Haha! Three cheers for William West!