Codex Alexandrinus 1 John 1:7 Reconstruction Attempt
Here is my attempt at a reconstruction of Codex Alexandrinus' 1 John 1:7 with allelwn. Any such reconstruction like this is arbitrary in choosing of letter size. I have kept open the possibility of a longer line as in 1:5 which trickles into the margin. A comparable example can be seen at 2:7 in the same colum with 1:7. The scribe also has a tendency to make the characters smaller if need be as the line nears the margin. My reconstruction does face difficulties with the third line down (1:8) where there is indication of smaller letters being used sooner. This suggests that the margin did not extend as far as my reconstruction would necessitate. However, I still think allelwn should not be ruled out as a possibility (e.g., note the eleventh line from the bottom in the same column). Further study of the scribal habits in Alexandrinus would help in answering this question.
The original image can be found at http://images.csntm.org/Manuscripts/GA_02/GA_02_0084b.jpg.