If we're throwing out ideas for No. 19 and I think it's a good idea as a collective brain is better than an empty one (which is me at the present time), comes round could indicate "visits". best friend could be pup/dog/rover/fido/setter/mutt/pooch/hound or any breed really, the Close could be cul-de-sac/dead end or the Close of a cathedral or it could be end/shut as in open/close. Best friend could be mate/pal/ally etc. etc. Protection could be blind/shield/shutter/fender/shelter/screen/cover/
guard etc. etc. etc. This may have confused things even more and I really must like down now in a darkened room as what little brain I have left has suddenly overheated.......... I have a feeling that because we are all practically left with the same two, we are probably trying to make it more complicated than it really is.