After reading Camera and the Tsars about Helen of Greece's aborted engagement , I started digging around (I love reading about unsuccessful royal engagements/marriages for some strange reason.
).
Anyway, here's what KR had to say:
24 May 1900
Iheard from Minnie about Maria Pavlovna's efforts to marry off her daughter Elena. After the failure with Max [of Baden], they are desperate to find another husband. Their choice fell on Albert of Belgium, but he did not seem particularly keen. M.P. then wrote to the Emperor, asking him to invite the King of Belgium to Peterhof for the summer, while Elena wrote to the young Empres, declaring her whole future depended on this invitation. At this point Albert of Belgium announced his engagement to a Bavarian princess, and Michen telegraphed the Emperor that there was no longer any need to invite the King.
19 June 1902
Mitia went to Krasnoe for the Ismailovsky celebrations and returned with the unexpected and joyful news of the engagement of Nicky of Greece to Elena Vladimirovna. Two years ago, when Elena caught Nicky's eye, her mother Maria Pavlovna made sure he was told not to count on Elena because, as the third son of a king, he was not a suitable match for her. Now Maria Pavlovna has had to change her mind, as her search for other suitors for her daughter has been in vain.
I wonder why this should be? It seems to me that a Romanov Grand Duchess, attractive and VERY wealthy, 1st cousin to the Tsar would make a very "marketable" candidate on the royal marriage mart. Also, since they were considering Max of Baden and Albert I of Belgium, it couldn't be a religious consideration narrowing down eligible princes. Why was she so hard to match up?