I think this what you are looking for Kirby, occurred on Saturday, March 9th, not the 19th. Its covered on pg 33 of proceedings.
From https://www.nytimes.com/1861/03/11/archives/the-missouri-state-convention.html
Actually no vote was taken, Gamble just presented the committee report. Redd then presented the minority substitute on the 11th.

ST. LOUIS, Sunday, March 10.

After some unimportant proceedings in the Convention yesterday, Judge GAMBLE, Chairman of the Committee on Federal Relations, presented and read the report of that Committee. The report is long and carefully written, makes a faithful exposition of all the circumstances surrounding the position and affecting the interests of Missouri, recounts the evils of which the South may rightfully complain, admonishes the North that the hostile and fanatical feelings towards Southern institutions manifested by a large number of the people of that section are productive of evil, and expresses the hope that a better knowledge of the subject will remove their prejudices. It does not assume a threatening attitude towards either extreme section of the country, but points out the errors of both, and concludes with the following resolutionss:

Resolved, That at present there is no adequate cause to impel Missouri to dissolve her connection with the Federal Union, but on the contrary she will labor for such an adjustment of the existing troubles as will secure peace, rights, and equality to all the States.

Resolved, That the people of this State are devotedly attached to the institutions of our country, and earnestly desire that by a fair and amicable adjustment the present causes of disagreement may be removed, the Union perpetuated, and peace and harmony be restored between the South and North.

Resolved, That the people of this State deem the amendment to the Constitution of the United States, proposed by Mr. CRITTENDEN, with the extension of the same to Territories hereafter to be acquired, a basis of adjustment, which will successfully remove the causes of difference forever from the arena of national politics.

Resolved, That the people of Missouri believe that the peace and quiet of the country will be promoted by a Convention to propose amendments to the Constitution of the United States, and that this Convention urges the Legislature of this State to take steps for calling such Convention.

Resolved, That, in the opinion of this Convention, the employment of military force by the Federal Government to coerce the seceding States, or the employment of force by the seceding States to assail th e Government of the United States, will inevitably plunge the country into civil war, and thereby extinguish all hope of an amicable settlement of the issues now pending; we, therefore, earnestly entreat the Federal Government, as well as the seceded States, to stay the arm of military power, and on no pretence whatever bring upon the nation the horrors of civil war.

Resolved, That when the Convention adjourns, it adjourn to meet at Jefferson City on the third Monday in December.

Resolved, That a Committee be elected, a majority of which shall have power to convene the Convention at such time and place prior to the third Monday in December, as the exigencies may require.

The report was ordered to be printed, and was made the special order for Monday.

Mr. REDD, whilst heartily approving the temper and spirit of the report, dissented from the plan of adjusment as laid down. He asked leave to present a minority report on Monday, which was granted, and the report was ordered to be printed.

Adjourned.

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John T Redd was a 44 year old lawyer from Palmyra, Marion County. His minority report was presented and printed on Monday the 11th signed by Redd and Harrison Hough., a 49 y/o circuit court judge from Wolf Island, Mississippi County. The gist of the report was a pro Union pro Slavery stance.

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The vote that occurred on the 19th in which Bast was the no vote was to accept an amendment by Moss to the 5th resolution. It was followed by several other amendments and votes to other portions of the committee report and resolutions.