Help needed with this Walter Michael Rowles headstone

[TROOPER ROLLO]

This is the headstone for Walter Michael Rowles.

He died on Tuesday, 1st January 1957
at 30 Trinity Road, Upper Tooting, London, age 76.

His wife was Grace Whyte Buchan and they married on 14.6.1913 at Wandsworth.
She died on 10th October 1974, age 84.

They are both buried at Wandsworth Cemetery. Block 12, Plot 251.
I hope this is the only wording on the stone.
Thank you for looking.

[Trishanne]

I'm very sorry but I have tried to enhance this, but I'm afraid I cannot make out anymore of the writing.  I do hope that there is somebody with a more advanced programme than mine who can help you.
Pat

[McGroger]

Sorry, Stuart, I'm with Pat in not being able to make anything much clearer. But I do think there is probably little more there than you already have because, although there seem to be another three lines below the clearer stuff, I think there is only one regarding vital detail: you can just make out "1974" in the lowest line.

I trust you already have the details from the memorial on Findagrave:https://www.findagrave.com/memorial/211828891/walter-michael-rowles

Peter

[TROOPER ROLLO]

Thanks Guys for having a go at this very difficult picture.
Yes this is from Find a Grave following a request from me for a photo.
I will have to try and get someone to give the stone a clean.
Regards
STUART

[Rivermaster]

Treasured memories of
Walter M Rowles
Died 1st January 1967
The Lord is My Shepard

The rest I cannot read. Sorry.  Used Levels, brightness/contrast, curves and saturation.  Even inverted image but could not get enough information.  I can see a few letters but not whole words
 

[TROOPER ROLLO]

Thanks Rivermaster for your time.
Maybe we have a member who lives nearby who is willing to give this stone a clean.
It is in Wandsworth Cemetery, Block 12, Plot 251.
At least we know what the plot looks like from a distance.
Thank you.