Hello again.
That being the case you will find the photo restore, and date forum within this site, very obliging and extremely knowledgeable. They have gone out of their way to assist me, and give new life to some old photos I came by.
Admittedly those photos were probably over 100 years, and some of the ones that may assist your quest could involve the living, but there is still the ability to Private Message some of the active forum members on that forum.
A quick look through the threads there will show you the range of assistance that can be had.
Old school photos in the period of your quest, and supposed localities, could also be another straw to follow up for ideas. Are there any of the "real" HJL and who were his class mates ?
Regards,
Alan.
PS. If there is a very strong identifying family likeness trait perhaps you could "innocently" publish an unnamed copy of a photo of your Grand Dad, asking if anyone recognised the person, and publish it on Rootschat or on a local web page, in the areas of your research. Could also ask for an estimate of the date of the photograph.
For the age you believe he was when he arrived in NZ, he could well have left progeny behind in his home area, or as a sailor, at his ports of call.
PSS Later. Excuse my naivety, from what I can find online tonight, we in NZ were better primary schooled for all comers, and with a good supply of school class photos surviving, though I have to admit a lot of our surviving 1890's class photos do not name the pupils there in. For named subjects one has to seek out school milestone anniversary books and booklets.