Apparently, Mr Biden had hoped to travel by train (Amtrak) to Washington; he had commuted daily by train when he was a young Senator, returning home to Delaware each night, and, more recently, he and Barack Obama (and their respective families) had also journeyed to Washington by train in 2009.
However, recent events (security concerns, rather than health ones) had decreed that this journey - a short one - was to be made by air.
And, of course, it was entirely beyond the tiny, seething, narcissistic mind - petty, pathetic, petulant - of Donald Trump to extend the basic courtesy of a government flight, just as it was beyond him (or his appalling wife) to even meet the Bidens, invite them for tea, or extend the courtesy of a White House tour.
Small graces, small decencies, small courtesies, but - nonetheless - very revealing of character.
And it was telling, revealing of character, a note of impeccable taste and class, of empathy and decency, dignity and decorum, that both Mr Biden and Ms Harris should - jointly - hold a memorial service (that rendition of Amazing Grace - sung by an African American nurse - a frontline health care worker - was spellbinding and spine-tingling), a formal, public, ritual of mourning to acknowledge, to mark, to note, to share in and to bear witness to, the publicly expressed grief of the tragic passing of just over 400,000 Americans, who have lost their lives to Covid.
Character and tone matter, in such a setting and at such a time.
And President-elect Biden and Vice-President-elect Harris have struck the right note, and passed the test of character this evening.