I see what you mean.
Would thaey have abbreviated on a will ??.
i know it's not helpfull for all my helpers not to have sight of the entire document.
The writer of the will perhaps thought that Assen Don were two words instead of one and that the L is a capital D.
The author's lower case L's are not the same as the possible L in lower although i cannot find an example of an upper case L to compare.
But in general you have all agreed that it is most likely Assendon in one form or another whether it be upper, lower, middle or slightly left of centre and for that i thank you.
Iain.