In 1880, shortly before he died, Dostoevsky gave his famous Pushkin
speech at the unveiling of the Pushkin monument in Moscow.  I would
very much like to get a free copy of this speech in English.

Thanks in advance!

You'll find an English translation of Dostoevsky's Pushkin Speech here
(the page numbers in the text refer only to a certain book which
published the speech):

Archive from DwightWebber.com: The Pushkin Speech
http://web.archive.org/web/20050207093332/http://www.dwightwebber.com/pushkinspeech.html

A different English translation is here:

Art Russe: Pushkin
http://www.artrusse.ca/Pushkin/pushkin_en.htm

My Google search strategy:

Google Web Search: dostoevsky "pushkin speech"
://www.google.com/search?hl=en&q=dostoevsky+%22pushkin+speech%22

I hope this is precisely what you need. If anything is unclear or
incomplete, or if a link does not function, please request
clarification; I'll gladly offer further assistance before you rate my
answer.

Best regards,
pinkfreud

Thank you!