1945年(nian)抗戰(zhan)勝(sheng)利后,蔣介石(shi)撕下了(le)和談的(de)(de)(de)假面(mian)具(ju),公(gong)然向全(quan)國(guo)各個解(jie)放(fang)區(qu)和革(ge)命根(gen)據地(di)發(fa)動了(le)大規模(mo)的(de)(de)(de)軍事進(jin)攻。為(wei)(wei)(wei)貫徹(che)執行黨(dang)(dang)中(zhong)央(yang)由(you)防御轉為(wei)(wei)(wei)-的(de)(de)(de)戰(zhan)略部(bu)署(shu),1945年(nian),浙東游擊(ji)縱隊奉命北(bei)撤,國(guo)民(min)黨(dang)(dang)反動派乘勢(shi)而(er)入,-再度籠(long)罩(zhao)三北(bei)大地(di)。面(mian)對中(zhong)共慈(ci)鎮(zhen)縣(xian)工(gong)(gong)委領導開(kai)(kai)展的(de)(de)(de)武裝游擊(ji)斗爭和群眾(zhong)斗爭,國(guo)民(min)黨(dang)(dang)反動派對三北(bei)地(di)區(qu)發(fa)動瘋狂的(de)(de)(de)政治、軍事清剿,一(yi)(yi)時狼煙四(si)起(qi),崗哨林立。為(wei)(wei)(wei)了(le)粉碎(sui)敵(di)人的(de)(de)(de)清剿計劃,中(zhong)共慈(ci)鎮(zhen)縣(xian)工(gong)(gong)委在(zai)宓(mi)家埭地(di)下黨(dang)(dang)員宓(mi)信官(guan)的(de)(de)(de)配(pei)合下,在(zai)梅山北(bei)坡找到了(le)一(yi)(yi)個天然石(shi)洞(dong)(dong),并利用該洞(dong)(dong)穴既能隱蔽疏散(san)、又便于聯絡(luo)的(de)(de)(de)有(you)利條(tiao)件(jian),辟其為(wei)(wei)(wei)中(zhong)共慈(ci)鎮(zhen)縣(xian)工(gong)(gong)委的(de)(de)(de)秘密辦公(gong)地(di),在(zai)此召開(kai)(kai)了(le)多次重要(yao)會議。四(si)明特工(gong)(gong)委組(zu)織(zhi)部(bu)長(chang)薛駒同(tong)志也曾到該洞(dong)(dong)傳達上級黨(dang)(dang)組(zu)織(zhi)的(de)(de)(de)指示(shi)。慈(ci)鎮(zhen)縣(xian)工(gong)(gong)委的(de)(de)(de)領導人為(wei)(wei)(wei)革(ge)命棲(qi)身于此,樂(le)觀(guan)地(di)把石(shi)洞(dong)(dong)稱為(wei)(wei)(wei)“石(shi)公(gong)館”。
從(cong)1947年冬到全(quan)國(guo)解放(fang)前夕,中(zhong)共慈(ci)鎮縣工(gong)委在“石公館”領導各地黨組織(zhi)和(he)革命群眾,深入開(kai)展反清剿斗爭,多(duo)次粉碎了國(guo)民黨反動派企圖扼殺慈(ci)鎮地區革命力量的(de)陰謀,發展壯大了革命武裝,為(wei)全(quan)國(guo)解放(fang)戰爭的(de)戰略-作出(chu)了積(ji)極的(de)貢獻。
“石(shi)公館”位于慈溪市觀海衛鎮昌明(ming)村梅山北坡崖壁峭石(shi)之中,是(shi)由幾塊不規則的巨石(shi)構(gou)成的天(tian)然洞(dong)穴(xue),洞(dong)口朝西北,洞(dong)高2.3米,深3.5米,底(di)寬1.9米。
“石(shi)(shi)公(gong)(gong)館”是解放戰(zhan)爭(zheng)中(zhong)(zhong)黨領導人(ren)(ren)民(min)(min)開(kai)展(zhan)武裝斗爭(zheng)的歷史(shi)見(jian)證。1985年(nian)(nian)5月,慈(ci)溪縣(xian)人(ren)(ren)民(min)(min)政府對“石(shi)(shi)公(gong)(gong)館”周(zhou)邊環境進(jin)行了(le)(le)整治(zhi),并修筑了(le)(le)一(yi)(yi)條寬(kuan)1米、長350米的臺階式石(shi)(shi)徑小道,在(zai)危石(shi)(shi)崖壁處設置了(le)(le)鋼管護(hu)欄。同(tong)年(nian)(nian),中(zhong)(zhong)國當代書法家(jia)張(zhang)森為“石(shi)(shi)公(gong)(gong)館”書丹題額,洞左壁勒石(shi)(shi)題刻《石(shi)(shi)公(gong)(gong)館記》:“1947年(nian)(nian)冬,中(zhong)(zhong)共(gong)慈(ci)鎮(zhen)縣(xian)工委為在(zai)國民(min)(min)黨反(fan)動派-下(xia)推進(jin)人(ren)(ren)民(min)(min)游擊戰(zhan)爭(zheng),于梅山(shan)北坡(po)巨石(shi)(shi)群中(zhong)(zhong)尋(xun)得(de)這一(yi)(yi)山(shan)洞,作為工委機(ji)關(guan)秘密(mi)(mi)駐地(di),名之(zhi)曰‘石(shi)(shi)公(gong)(gong)館’。梅山(shan)地(di)處慈(ci)鎮(zhen)中(zhong)(zhong)心,松(song)竹(zhu)繁密(mi)(mi),人(ren)(ren)跡罕至,既利(li)于聯(lian)絡,又宜于隱(yin)蔽,工委許多重要會議在(zai)此(ci)召開(kai)。革命者棲身山(shan)野,心懷(huai)天下(xia),依靠群眾(zhong),堅持斗爭(zheng)一(yi)(yi)年(nian)(nian)有余,多次粉碎敵人(ren)(ren)政治(zhi)、軍事清剿,發(fa)展(zhan)壯大(da)人(ren)(ren)民(min)(min)力量,在(zai)慈(ci)鎮(zhen)人(ren)(ren)民(min)(min)解放斗爭(zheng)史(shi)上譜(pu)寫(xie)了(le)(le)光(guang)輝篇章。”
1986年慈溪縣人(ren)民(min)政府將“石公館”公布(bu)為第二批文物(wu)保護單位。