Meaning of 書候 in Japanese

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Definition of 書候

こう(kou) 【候】

そろ(soro) · そう(sou) · さう(sau) · す(su) 【候】

(aux) to be (auxiliary used in place of "aru" after "de" or "ni" when forming a copula); to do (auxiliary used in place of "-masu" after a -masu stem) →Related words: 候ふ

しょ(sho) 【書】

そうろう(sourou) · そうらう(sourau) 【候ふ ·候】

(v4h, vi) to serve (by a superior's side)
(aux-v, v4h) to be (auxiliary used in place of "aru" after "de" or "ni" when forming a copula); to do (auxiliary used in place of "-masu" after a -masu stem)