MarianneWhite, The extra letter for 14* is D (not N) HYE is antiquated high, Hyde was a bit of a character. 17 is NAURU but without last U (mostly) around anagram of SITE to make NASTIER, with the first U being the extra letter. 29 extra letter isn't L, it's Y. Terrapin is EMYS, without S (brief), preceded by IT (sex appeal). So, so far you have 'I RODE UNSTEADILY...' which obviously gives notice of an anagram, but beware that 'I' is not included. So anagram RODE after CH (an obsolete, dialectic form of 'I'), putting the whole of that inside SINGER, a sewing machine, and you end up with the anglicised spelling of one of the physicists who Hitler foolishly made unwelcome in Germany. And even people who have no interest in science will have heard of his cat, which you couldn't be sure was dead or alive.
Now look also at comment 7. for the last 4 letters of 1D you will have either DBAH or WBYM. Just key each of those in turn into the link, to match BERG. In one case you get 5 possibilities returned, in the other case only two. And in any case there is only one possibility which is faintly relevant.
I hope this helps.