I can see how David Thomas got his answer as I worked it out and got the same answer, but as he hasn't added an explanation (he has now), this is how you get the answer:
The telegram is telling you
THE MORE MIRTH THE MERRIER
TL;DR
The morse code gives binary for the phrase
#Detailed Explanation
Detailed Explanation
The morse code represents binary, each dash is a 1 and each dot is a 0.
Converting gives:
1 0 100 / 000 0000 0 0 1 000 / 000 0 10 1 / 0000 00 000 / 01 10 1 / 1 111 / 1 0 0 10 / 000 0000 0 00 101 / 00 / 000 0000 01 10 1 / 0000 0 1001 / 000 00 000 1 0 010 / 000 01 0100 / 01 000 / 000 0000 0 / 00 000 000 001 0 100 / 0010 0 0 / 000 0000 00 0010 1 / 00 000 / 011 0 1 / 000 001 0 1 / 0 0001 0 010 / 1 00 10 / 000 001 00 1 / 0 0 101 / 000 00 010 0 10
Squishing that together gives:
10100 / 0000000001000 / 0000101 / 000000000 / 01101 / 1111 / 10010 / 0000000000101 / 00 / 000000001101 / 000001001 / 0000000010010 / 000010100 / 01000 / 00000000 / 000000000010100 / 001000 / 00000000000101 / 00000 / 01101 / 00000101 / 000010010 / 10010 / 000001001 / 00101 / 00000010010
Removing the slashes and leading zeroes, and also for any word which is comprised of only 0s, replacing it with a / to make it easier to read gives:
10100 1000 101 / 1101 1111 10010 101 / 1101 1001 10010 10100 1000 / 10100 100 101 / 1101 101 10010 10010 1001 101 10010
Now converting from binary using the table, and the / as a space gives the final phrase:
THE MORE MIRTH THE MERRIER
Red Herrings
The red herring that threw me and Gareth in chat off to start:
There are 26 words in the question, which we thought might correspond to the alphabet.
And another red herring which initially convinced Gareth to post an answer is that
The first part of the morse is -.-.. which matches the first piece of binary 10100, however this doesn't work for all the parts.
But the biggest red herring:
Everything in the telegram but the morse code is unneeded!
