咳疾暑毒，书札绝懒，盛使远来，迟留经月，临歧执笔，又不觉累纸，盖于相知之深，虽已缕缕至此，殊觉有所未能尽也。
咳嗽之疾加上暑毒，懒于写信；盛使远来，滞留经月，临别执笔，又不觉写了满纸。相知之深，虽已缕缕至此，仍觉有未能尽言的。
The cough and summer's poison have made me slothful with the brush; your messenger, come so far, has waited a month, and at parting, taking up the pen, I have filled sheet on sheet unawares. Deep as our knowing is, thread upon thread said, still much seems unsaid.