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It did not deliver the 1948 address to the Association for Symbolic Logic, at Columbus, Ohio, obviously. Weil read it for it, as we learn from Zorn's report about the meeting in the same issue of The Journal of Symbolic Logic linked in the OP:

[] Most of the biographical claims were, in practice, unverifiable. Kline could neither write to far-off universities or possibly defunct academies, nor assert with incontestable authority that they did not exist – notwithstanding his justified certainty that the claims were invented. Bourbaki’s Rockefeller Fellowship, however, could be easily assayed from within Kline’s own professional network. He wrote to the foundation’s Warren Weaver on the pretense of checking Bourbaki’s fellowship history, but really as a chance to vent his frustration over the undignified behavior of the French upstarts. Even Bourbaki’s discrepant signatures earned a remark, having deteriorated from that “of a determined man” in the first application to a “cramped” and “infantile” one."

It did not deliver the 1948 address to the Association for Symbolic Logic at Columbus, Ohio, obviously. Weil read it for it, as we learn from Zorn's report about the meeting in the same issue of The Journal of Symbolic Logic linked in the OP:

[...] Most of the biographical claims were, in practice, unverifiable. Kline could neither write to far-off universities or possibly defunct academies, nor assert with incontestable authority that they did not exist – notwithstanding his justified certainty that the claims were invented. Bourbaki’s Rockefeller Fellowship, however, could be easily assayed from within Kline’s own professional network. He wrote to the foundation’s Warren Weaver on the pretense of checking Bourbaki’s fellowship history, but really as a chance to vent his frustration over the undignified behavior of the French upstarts. Even Bourbaki’s discrepant signatures earned a remark, having deteriorated from that “of a determined man” in the first application to a “cramped” and “infantile” one."

That MacLane was a close Bourbaki associate (without formally joining) helped, and the consonance with the title of MacLane's famous book of 1971 is peculiar. And this was not the first or last stunt Weil and co. performed on Bourbaki's behalf, see Barany, Impersonation and personification in mid-twentieth century mathematics:

That MacLane was a close Bourbaki associate (without formally joining) helped, and the consonance with the title of MacLane's famous book of 1971 is peculiar. But this was not the first or the last stunt Weil and co. performed on Bourbaki's behalf, see Barany, Impersonation and personification in mid-twentieth century mathematics:

It did not deliver the 1948 address to the Association for Symbolic Logic, at Columbus, Ohio, obviously, Weil and/or Dieudonné enlisted someone to do it. I do not know the identity of the stand-in, but by that time the group had plenty of American co-conspirators to choose from, including the lesser known ones. Not that they cared to hide the ruse at that point. And that was only one of their many antics, see Barany, Impersonation and personification in mid-twentieth century mathematics:

Back in 1935 they engineered Bourbaki's first publication with a distinct flavor of a prank, complete with a made up country of origin:

It did not deliver the 1948 address to the Association for Symbolic Logic, at Columbus, Ohio, obviously. Weil read it for it, as we learn from Zorn's report about the meeting in the same issue of The Journal of Symbolic Logic linked in the OP:

"There were two invited hour addresses: N. Bourbaki, Foundations of mathematics for the working mathematician, and F. B. Fitch, Towards a demonstrably consistent mathematics. The first address was read by Andre Weil on Friday morning, Saunders MacLane presiding; the second was given on Friday afternoon, with A. A. Bennett as presiding officer."

That MacLane was a close Bourbaki associate (without formally joining) helped, and the consonance with the title of MacLane's famous book of 1971 is peculiar. And this was not the first or last stunt Weil and co. performed on Bourbaki's behalf, see Barany, Impersonation and personification in mid-twentieth century mathematics:

Back in 1935 Weil engineered Bourbaki's first publication with a distinct flavor of a prank, complete with a made up country of origin: